Bsi bs en 15434 2006 + a1 2010

EUROPÄISCHE NORM March 2010 English Version Glass in building - Product standard for structural and/or ultra- violet resistant sealant for use with structural sealant glazing and/or in

insulating glass units

with exposed seals)

ICS 81.040.20

This British Standard is the UK implementation of

EN 15434:2006+A1:2010 It supersedes BS EN 15434:2006 which is withdrawn

The start and finish of text introduced or altered by amendment is indicated

in the text by tags Tags indicating changes to CEN text carry the number

of the CEN amendment For example, text altered by CEN amendment A1

is indicated by !"

The UK participation in its preparation was entrusted by Technical Committee B/520, Glass and glazing in building, to Subcommittee B/520/4, Properties and glazing methods

A list of organizations represented on this subcommittee can be obtained on request to its secretary

This publication does not purport to include all the necessary provisions of

a contract Users are responsible for its correct application

Compliance with a British Standard cannot confer immunity from legal obligations.

This British Standard was

published under the authority

of the Standards Policy and

Strategy Committee

on 30 June 2006

Amendments/corrigenda issued since publication

Date Comments

EUROPÄISCHE NORM March 2010

English Version Glass in building - Product standard for structural and/or ultra-

violet resistant sealant (for use with structural sealant glazing

and/or insulating glass units with exposed seals)

Verre dans la construction - Norme de produits pour produit

de collage et de scellement structurel et/ou résistants aux

rayonnements ultraviolets (utilisé pour les vitrages

extérieurs collés et/ou pour les vitrages isolants à bords

exposés)

Glas im Bauwesen - Produktnorm für lastübertragende und/oder UV-beständige Dichtstoffe (für geklebte Verglasungen und/oder Isolierverglasungen mit exponierten

Dichtungen)

This European Standard was approved by CEN on 3 April 2006 and includes Amendment 1 approved by CEN on 25 January 2010 CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN Management Centre or to any CEN member

This European Standard exists in three official versions (English, French, German) A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as the official versions

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom

EUROPEAN COMMITTEE FOR STANDARDIZATION

C O M I T É E U R O P É E N D E N O R M A L I S A T I O N

E U R O P Ä I S C H E S K O M I T E E FÜ R N O R M U N G

Management Centre: Avenue Marnix 17, B-1000 Brussels

© 2010 CEN All rights of exploitation in any form and by any means reserved

worldwide for CEN national Members

Ref No EN 15434:2006+A1:2010: E

Contents Page

Foreword 4

1 Scope 5

2 Normative references 5

3 Terms and definitions 6

4 Sealant 7

4.1 General 7

4.2 The compulsory part of the product description 7

5 Requirements 8

5.1 General 8

5.1.1 Identification - performances 8

5.1.2 Application 8

5.2 Identification tests 9

5.2.1 General 9

5.2.2 Thermogravimetric analysis 9

5.2.3 Specific gravity 9

5.2.4 Shore A hardness 9

5.2.5 Change in volume or shrinkage 10

5.2.6 Infrared spectrometer analysis 10

5.3 Intrinsic properties 10

5.3.1 General 10

5.3.2 Standard substrates and test pieces 10

5.3.3 Tensile 11

5.3.4 Shear at 23 °C 12

5.3.5 Elastic recovery 12

5.3.6 Tear strength 13

5.3.7 Mechanical cyclic load 14

5.3.8 Displacement under permanent shear load (creep test) 15

5.3.9 Elastic modulus of the sealant 18

5.4 Environmental influences 18

5.4.1 General 18

5.4.2 Determination of cohesion/adhesion properties after exposure to artificial light through glass and to water 18

5.4.3 Salt spray 20

5.6 Reaction to fire 21

5.7 Dangerous substances 22

5.8 Outer seal of insulating glass unit category differentiation 22

6 Sealing and bonding 22

7 Compatibility with adjacent material 22

8 Evaluation of conformity 27

8.1 General or scope 27

8.2 Requirements 27

8.2.1 Product description 27

8.2.2 Conformity with the definition of sealant 27

8.2.3 Determination of the characteristic’s performances 27

8.2.4 Durability 28

8.2.5 Dangerous substances 29

8.3 Evaluation of conformity 29

8.3.1 General 29

8.3.2 Initial type testing of the product (see Clause 5) 29

8.3.3 General 29

8.4 Factory production control and inspection of samples in accordance with a prescribed test plan (8.3.1.1, 1 a) and 1 b)) 31

8.4.1 General 31

8.4.2 Initial inspection of factory and of factory production control (8.3.1.1 1 b)) 31

8.4.3 Continuous surveillance and assessment of the factory production control (see 8.3.1.1 1 c)) 32

9 Marking and/or labelling 33

9.1 General 33

9.2 Labelling 33

9.3 Product marking 33

9.4 Product characteristics 33

9.5 “Characteristics/performance identification paper” 33

Annex A (normative) Evaluation of mechanical tests results 35

Annex B (normative) Shear at 23 °C: Test method 42

Annex C (normative) Factory production control 44

Annex D (normative) Outer seal of insulating glass category differentiation 49

Annex E (normative) Formation of bubbles 54

Annex F (informative) Sealing, structural bonding and UV resistance: schematic illustrations 56

Annex G (normative) Initial testing of bonding of sealant to non-glass substrates 59

Annex V (informative) Provisions for voluntary involvement of third party(ies) 61

Bibliography 62

Foreword

This document (EN 15434:2006+A1:2010) has been prepared by Technical Committee CEN/TC 129

“Glass in building”, the secretariat of which is held by NBN

This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by September 2010, and conflicting national standards shall be withdrawn at the latest by September 2010

Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights

This document includes Amendment 1, approved by CEN on 2010-01-25

This document supersedes EN 15434:2006

The start and finish of text introduced or altered by amendment is indicated in the text by tags ! " This European Standard is one of a series of interrelated standard parts dealing with:

- glass products for structural sealant glazing systems;

- installation of glass products in a structural manner on building façades;

- UV-resistant and structural sealant for use in structural sealant glazing

The interrelated parts are:

 EN 13022-1: Glass in building — Structural sealant glazing — Part 1: Glass products for

structural sealant glazing systems for supported and unsupported monolithic and multiple glazing

 EN 13022-2: Glass in building — Structural sealant glazing — Assembly rules

 EN 15434: Glass in building — Product standard for structural and/or ultra-violet resistant sealant

(for use with structural sealant glazing and/or insulating glass units with exposed seals)

According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom

1 Scope

!This European Standard covers the requirements for and testing of sealants for use in one or more

of the following applications:

a) Manufacturing of insulating glass units where ultra-violet resistance and/or mechanical resistance (structural use) of the insulating glass edge seal is required

b) Manufacturing of factory made structural sealant glazing elements when referred to by the relevant European Standards and/or European Technical Approval Guidelines

c) Assembling of glass products into or onto supports, where also ultra-violet resistance and/or mechanical resistance (structural use) of the seal is required, under controlled environmental conditions as described in Clause 5 of EN 13022-2: 2006

NOTE 1 The required level of resistance to ultra-violet exposure will be dependent upon the degree of exposure to ultra-violet radiation

NOTE 2 Only silicone based sealants are permitted for the applications a, b and c above

d) Manufacturing of insulating glass units where the outer seal of the insulating glass has no structural function and exposure to ultra-violet radiation is reduced for example either by:

i) Use of glass components that decrease the ultra-violet radiation transmission, e.g laminated glass with ultra-violet absorbing interlayer(s), screen enamelled printing, etc.,

or

ii) Use of durable applied opaque surface coverings, e.g metal components, etc

NOTE 3 Dependent upon the amount of ultra-violet radiation exposure both organic and silicone based sealants are permitted

This European Standard covers the evaluation of conformity and the factory production control with respect to the production of sealants in conformity with this standard

This European Standard describes the role of sealants that are in conformity with this European Standard, with respect to sealing and bonding

This European Standard does not apply to sealants for the manufacture of insulating glass units where the seal is fully protected, i.e by a frame, from ultra-violet radiation

NOTE 4 Sealants for this application should comply with EN 1279-4

This European Standard contains other aspects of importance for trade."

2 Normative references

The following referenced documents are indispensable for the application of this European Standard For dated references, only the edition cited applies For undated references, the latest edition of the referenced document (including any amendments) applies

EN 572-1, Glass in building — Basic soda lime silicate glass products — Part 1: Definitions and general physical and mechanical properties

EN 572-2, Glass in building — Basic soda lime silicate glass products — Part 2: Float glass

EN 1279-4:2002, Glass in building — Insulating glass units — Part 4: Methods of test for the physical attributes of edge seals

EN 13022-1:2006, Glass in building — Structural sealant glazing — Part 1: Glass products for structural sealant glazing systems for supported and unsupported monolithic and multiple glazing

EN 13022-2:2006, Glass in building — Structural sealant glazing — Part 2: Assembly rules

EN 13501-1, Fire classification of construction products and building elements — Part 1: Classification using data from reaction to fire tests

EN ISO 527-3, Plastics — Determination of tensile properties — Part 3: Test conditions for films and sheets (ISO 527-3:1995)

EN ISO 868, Plastics and ebonite — Determination of indentation hardness by means of a durometer (Shore hardness) (ISO 868:2003)

EN ISO 1183-1:2004, Plastics — Methods for determining the density of non-cellular plastics — Part 1: Immersion method, liquid pyknometer method and titration method (ISO 1183-1:2004)

EN ISO 3231, Paints and varnishes — Determination of resistance to humid atmospheres containing sulfur dioxide (ISO 3231:1993)

EN ISO 4892-2, !Plastics — Methods of exposure to laboratory light sources — Part 2: Xenon-arc lamps (ISO 4892-2:2006)"

EN ISO 7389, Building construction — Jointing products — Determination of elastic recovery of sealants (ISO 7389:2002)

EN ISO 8339, Building construction — Sealants — Determination of tensile properties (Extension to break) (ISO 8339:2005)

!EN ISO 9227, Corrosion tests in artificial atmospheres — Salt spray tests (ISO 9227:2006)"

EN ISO 10563, Building construction — Sealants— Determination of change in mass and volume (ISO 10563:2005)

EN ISO 11358:1997, Plastics — Thermogravimetry (TG) of polymers — General principles (ISO 11358:1997)

ISO 16269-6, Statistical interpretation of data — Part 6: Determination of statistical tolerance intervals

3 Terms and definitions

For the purposes of this European Standard, the terms and definitions given in EN 13022-1:2006,

EN 13022-2:2006, EN 1279-4:2002 and the following apply

3.3

initial type testing

determination of the performance of a product (characteristic, durability), on the basis of either actual tests or other procedures (such as conventional, standardised, tabulated or general accepted values, standardised or recognised calculation methods, test reports when made available), in accordance with this European Standard that demonstrates compliance with this European Standard

document that details the relevant parameters for defining a product that complies with the standard

It includes specific reference(s) to characteristics that are modified by the production process and by raw materials

4 Sealant

4.1 General

For conformity purposes, the sealant manufacturer shall describe the product in a product description, which will be part of the factory production control documentation, or of the quality insurance system, whichever is applied

Disclosure of the product description is entirely at the discretion of the sealant manufacturer or his agent

The product description shall contain at least a normative part, and may contain an informative part when the manufacturer foresees further development of the product

The product description shall be prepared under the responsibility of the sealant manufacturer or his agent

4.2 The compulsory part of the product description

The compulsory part of the description consists of three sub parts:

3) initial cure information:

 relevant data (or figure or values) depending on the temperature and the relative humidity, the chemistry of the curing system, number of components, mixing ratio and tolerances, section of the sealant to be applied, the nature of the adhesion surfaces …; 4) cured sealant description:

 list of identification test results in accordance with 5.2 in order to ensure no significant change in the characteristics, properties and durability of the sealant

The definition of product families shall be consistent with the normative part of the product description The substitution of raw materials or change in the process shall maintain the conformity with the product description The substituting material can be added to the product family and also the product description when compliance has been demonstrated

5 Requirements

5.1 General

5.1.1 Identification - performances

Sealants shall be identified by the tests referred to in 5.2

The performances of the characteristics claimed in Table 1 shall be determined The assessments to which Table 1 refers include the durability of the sealant

5.1.2 Application

The sealant shall be applied in conformity with the manufacturer’s recommendations and of the requirements of Clause 5 of EN 13022-2:2006

Table 1 — The performances of the characteristics to determine if relevant

1 Mechanical resistance and stability None

2 Safety in case of fire:

3 Hygiene, health and the environment::

3.1 Release of dangerous substances 5.7

4 Safety in use:

4.1 Resistance against wind, snow, permanent load and/or imposed loads of

the glass unit

5.3 and 5.4

5 Protection against noise

(when intended for use in insulating glass seal):

5.3, 5.4, 5.5 and 5.8

6 Energy economy and heat retention 5.3, 5.4, 5.5 and 5.8

5.2 Identification tests

5.2.1 General

All tests of 5.2 except 5.2.5 "Change in volume" are carried out on cured products When no curing time has explicitly been stated by the sealant manufacturer, a curing time of at least 28 days at (23 ± 2) °C and (50 ± 5) % relative humidity shall be maintained

The identification test performances are independent of the production equipment used, provided that

a factory production control in accordance with Annex C is in use

5.2.2 Thermogravimetric analysis

The test shall be carried out in accordance with EN ISO 11358:1997, Temperature scanning method, Procedure A, non-oxidative condition, temperature slope 10 °C/min

After conditioning / curing: (23 ± 2) °C, (50 ± 5) % RH, 28 days

Number of test pieces: 1

Evaluation:

 curve and the first derivate of the curve;

 percentage of cumulative losses up to 900 °C;

 zones of maximum loss through volatilisation;

 exo- or endothermic conversion zones

5.2.3 Specific gravity

The determination of the specific mass shall be in accordance with EN ISO 1183-1:2004, Method A Test samples to take from:

 cured product;

 non cured product (mono component sealant);

 components (multiple component sealant)

Number of test pieces per test sample: 3

Evaluation: each value, after complete curing shall be within the minimum and maximum value declared by the sealant manufacturer

5.2.4 Shore A hardness

The measurement of the shore A hardness shall be carried out in accordance with EN ISO 868

Test time: 3 s, every sample 5 times

The measurement shall be carried out on three test pieces after full curing of the sealant

Number of test specimen: 3

Evaluation: each value after complete curing shall be within the minimum and maximum value declared by the sealant manufacturer

5.2.5 Change in volume or shrinkage

The aim of this test is to evaluate the degree of change of volume or shrinkage of the structural sealants to limit the initial stresses in the SSG joints

The test shall be carried out in accordance with EN ISO 10563

Number of test pieces: 3

Evaluation: the average change in volume shall not exceed 10 %

5.2.6 Infrared spectrometer analysis

The infrared spectrum is measured by transmission or by reflection in the range from 2,4 µm to 50 µm, preferably by use of a KRS 5 crystal

Test specimen: a tongue shaped amount of cured sealant which shall be conditioned for at least

48 h at (23 ± 2) °C, subsequently subjected to pyrolysis

Evaluation: the measured spectrum high lighting the relevant characteristic wavelengths of absorption

5.3.1 General

For determining these properties, the tests are to be carried out on test pieces according to 5.3.2

The rigidity modulus and strength R u,5 are defined in Annex A

The intrinsic properties are independent of the production equipment used, provided that a factory production control in accordance with Annex C is in use

5.3.2 Standard substrates and test pieces

Flat float glass, in accordance with EN 572 Parts 1 and 2, is to be used as a standard glass substrate Unless otherwise indicated in the various clauses, test pieces are to be used with the dimensions given in Figure 1 Substrate dimension may be different from those given in Figure 1 The dimensions

of the sealant joint, however, shall always be 12 mm x 12 mm x 50 mm

Figure 1 — Standard test piece

Unless otherwise specified in this European Standard the test pieces shall be conditioned for 28 days

at (23 ± 2) °C and (50 ± 5) % R.H., or in conformity with the specification of the sealant’s manufacturer

The stresses are given in MPa by the ratio of the breaking force in N and the initial cross section area

in mm²

5.3.3 Tensile

Tests are carried out in conformity with EN ISO 8339, Conditioning A

After conditioning for 24 ± 4 hours, pulling of the test pieces at the following temperatures:

 for the class T1: -20 °C, +23 °C, +80 °C;

 for the class T2: -40 °C, +23 °C, +80 °C (for Nordic countries)

Number of test specimen: 10 for each temperature

Evaluation:

a) general:

visual examination: rupture shall be at least of 90 % cohesive;

b) sealant for structural purposes

Criteria as defined in Table 2:

Table 2 — Criteria for sealant for structural purposes

Criteria

Class T1:

80 °C ∆x mean ≥ 75 %

23 °C Ru5 ≥ 0,5 MPa -20 °C ∆x mean ≥ 75 % Class T2:

80 °C ∆x mean ≥ 75 %

23 °C Ru5 ≥ 0,5 MPa -40 °C ∆x mean ≥ 75 %

With ∆x mean = X mean θ°C / X mean 23°C

X mean is defined in A.1

From the stress-at-elongation graph recorded, the following shall be noted:

 type of failure - whether cohesive or adhesive;

 stress at elongations of 5 %, 10 %, 15 %, 20 % and 25 %;

 stress and elongation at rupture, only for test specimens conditioned at + 23 °C

c) sealant for use for non structural insulating glass unit seals:

 strength and elongation criteria according to EN 1279-4

5.3.4 Shear at 23 °C

Tests are carried out in conformity with Annex B

Direction of force: longitudinal

Number of test specimen: 10

Pulling of the test pieces at the following temperatures: -20 °C, +23 °C, +80 °C

Evaluation: Shear displacement

Criteria identical to 5.3.3

Rupture shall be at least of 90 % cohesive

5.3.5 Elastic recovery

Record:

 initial stress and elongation;

 final stress and elongation;

 elongation after unloading the test pieces

Number of test specimen: 3

Evaluation:

- sealant for structural purposes: the average of the elastic recovery shall be at least 95 %

5.3.6 Tear strength

The aim of this test is to establish the mode of propagation of a cut in the structural sealant

Five test pieces are prepared as specified in 5.3.2

After curing, the test pieces are cut at the ends of the sealant as shown on Figure 2

The samples are tested to destruction in accordance with 5.3.3 and EN ISO 8339 at the temperature:

23 °C ± 2 °C

Number of test pieces: 5

Evaluation: The average tear breaking strength value shall be:

 when insert in the structural seal (e.g mechanical self-weight support, safety devices, other elements as relevant):

at least 0,75 times the average value as measured by 5.3.2 at 23 °C: ∆Xmean > 0,75;

 without insert in the structural seal:

at least 0, 50 times the average value as measured by 5.3.2 at 23 °C:∆Xmean≥ 0,50

Rupture shall be at least of 90 % cohesive

Where ∆Xmean =X mean tear /X mean 23°C

Dimensions in millimetres

Key

1 float glass

2 float glass

3 sealant with 5 mm deep incisions at the extremes

Figure 2 — Test specimen for the tear strength test 5.3.7 Mechanical cyclic load

The purpose of this test is to evaluate the effect of fatigue stresses on the residual mechanical

strength of the sealant bond

Test specimens are subjected to repetitive tensile loads with a cycle time of 8 s (see Figure 3):

 100 times from 0,1 σdes to the design stress σdes;

 250 times from 0,1 σdes to 0,8 x the design stress σdes;

 5 000 times from 0,1 σdes to 0,6 x the design stress σdes;

After 24 h conditioning at (23 ± 2) °C and (50 ± 5) % relative humidity and after visual inspection of the

sealing, the test specimen shall be subjected to tensile test

Number of test specimen: 10

Key

t1 duration of the peak load ≥ 2 s

t2 rest time ≥ 2 s

t3 cycle period time ≤ 8 s

Figure 3 — Stress cycle for fatigue test

Evaluation:

a) sealant for structural purposes:

- rigidity modulus: average shall not deviate more than 25 % from the rigidity modulus as

measured by 5.3.3 at 23 °C;

- strength: R u,5 shall not be less than 75 % of the mean value of the tensile test according to

5.3.3, at 23 °C (∆Xmean≥ 0,75)

- rupture shall be at least of 90 % cohesive;

b) outer seal of insulating glass unit without structural function

- strength and elongation criteria according to EN 1279-4

5.3.8 Displacement under permanent shear load (creep test)

5.3.8.1 Purpose of the test

This test is applicable for sealant intended for structural purposes and under permanent shear load

5.3.8.2 Creep factor: definition and requirement

Factor γc by which the shear design stress under dynamic load Γdes shall be divided to obtain a

permanent shear design stress Γ∞ for which no creep is measurable following the criteria of the test

The value of Γdes = R u;5 /6

The value of R u;5 declared by the manufacturer and verified in accordance with 5.3.3

5.3.8.3 Test specimen

The test specimen shall conform to Figure 4 The sealant height h shall be declared by the sealant’s

manufacturer for the test with a minimum value of 12 mm for the outer seal of insulating glass with structural function

Dimensions in millimetres

Key

1 spacer to maintain the extension

2 structural sealant height h to be declared by sealant manufacturer

Dimensions in millimetres

Figure 5 — Load arrangement for creep measurement

The creep installation subjects simultaneously the test specimens for 91 days to (see Figure 5):

 tensile loading of: Fti, = 2400 Pti,

where P t,i = 0,3x σdes for 91 days;

R u,5 is determined for structural purposes in accordance with 5.3.4 at 23 °C;

 permanent shear loading of: Fs = 2400 Γ∞ (5) With Γ∞, stress given by the manufacturer, taking into account a minimum creep factor of 10

Evaluation:

 creep evolution at 1 day, 3 days, 7 days, 10 days then each 7 days after loading;

 deformation after 91 days before unloading;

 residual deformation 24 h after unloading

The sealant shall be “Displacement under permanent shear load” (creep) graded in accordance with Table 3

The grade C 1 is applicable for the value of the height of the seal declared for the test and for inferior values of this declared height

Table 3 — Displacement under permanent shear load (creep) gradation of sealant

For all test specimen:

– after 91 days loading: the displacement shall be stabilized at u ≤ 1 mm

– after 24 h unloading: the maximum displacement u ≤ 0,1 mm

All not grade C1 sealant

5.3.9 Elastic modulus of the sealant

The aim of this test is to determine the calculation of the modulus E0

The test shall be carried out in conformity with EN ISO 527-3 with all the test pieces having a thickness of (2,2 ± 0,2) mm

The manufacturer shall give the modulus type to be introduced in the calculation, either tangent or secant to the origin In the latter case, the boundaries of the curve (deformation, stress (ε1, σ1), (ε2, σ2)) between which the calculation modulus

Number of test pieces: 5

Speed of the traction: 5 mm/min

The maximum relative elongation allowed in the calculation shall correspond to the upper boundary used to determine the calculation modulus

The test report shall contain the graphs (deformation, stress) for each sample tested

5.4.1 General

The performances as function of the environmental influences are independent of the production equipment used, provided that a factory production control in accordance with Annex C is in use The test pieces shall be prepared as described in 5.3.2

5.4.2 Determination of cohesion/adhesion properties after exposure to artificial light through glass and to water

Purpose and principle of the test

The purpose of this test is to evaluate the sensitivity of the structural sealant to artificial ageing, combining the effect of the ultraviolet radiation and the exposure to water, by measuring the residual mechanical strength of the structural sealant

Test specimens are prepared in which the sealant to be tested adheres to two parallel glass surfaces After submitting the test specimens to a permanent artificial light at elevated temperature and to water, the test specimens are extended at rupture

Test specimens description

The test pieces are prepared as defined in 5.3.2 with the following changes:

 at least one substrate of the test piece is a flat float glass, in accordance with EN 572: Parts 1 and 2, used as a standard glass substrate;

 thickness of the float glass exposed to the UV radiation is 6 mm;

 when the test piece is made with two different substrates (including float glass 6 mm) the upper

part of the test piece exposed to the UV is the float glass substrate

Number of test pieces

10 for initial and 10 for conventional conditioning

after initial conditioning test specimens shall be immersed in demineralised water (resistance shall

be less than 10 MΩ, < 30 µS) at a controlled temperature of (45 ± 1) °C

The upper glass substrate shall be flush with the water level

During the total time of the immersion (1 008 h), the test specimens are exposed to the radiation of Osram Vitalux lamps1 ) The intensity of the radiation on the upper side of the test specimen shall be (50 ± 5) W/m² for the wavelength range from 300 nm to 400 nm

After the 1 008 h of exposure the test specimens shall be conditioned at (23 ± 3) °C during (24 ± 2) h, followed by destructive tensile testing

Tensile testing

The 20 test pieces are submitted to a destructive tensile testing at a speed of (5,5 ± 0,5) mm/min Record

 stress at breaking point

 elongation at breaking point

 type of rupture

1 ) Ultra-Vitalux ® is the trade-name of a product supplied by OSRAM in Mercurius straat 28, B-1930 Nossegem

or in Steinerne Furt 62, D-86167 Augsburg This information is given for the convenience of users of this European Standard and does not constitute an endorsement by CEN of the product named Equivalent products may be used if they can be shown to lead to the same results

Specifications:

a) sealant for structural purposes:

 stress at the breaking point as measured in accordance with 5.3.3 at +23 °C:

∆Xmean≥ 0, 75;

 secant stiffness (or rigidity modulus) shall be as follows: 0,5 ≤ Kx,c/Kx≤ 1,10

(with 0 ≤ x % ≤ 12,5 of the deformation/stress curve) See A.4: Stiffness;

 rupture shall be at least of 90 % cohesive

b) sealant for use for non structural insulating glass unit seals (if relevant):

strength and elongation criteria according to the requirement of EN 1279-4

5.4.3 Salt spray

This test is applicable for sealant intended for structural purposes

Conditioning:

- conditioning of the test pieces shall be carried out in accordance with !EN ISO 9227"

- atmosphere NSS shall be maintained for 480 h for uncoated glass, glass coated on face 4 (and other substrates), and for 240 h for glass coated on faces 2 and 3

Number of test specimen: 5

Evaluation:

sealant for structural purposes:

 Stress at the breaking point as measured in accordance with 5.3.3 at +23 °C : ∆Xmean≥ 0,75;

 rupture shall be at least of 90 % cohesive

5.4.4 SO 2 atmosphere

The conditioning of the test pieces shall be carried out in accordance with EN ISO 3231

Corrosion test in artificial atmosphere

5.4.5 Façade cleaning products

The test is applicable for sealant intended for structural purposes

Immerse five test pieces 21 days in the cleaning product(s), as recommended by the façade supplier and/or used in practice, at (45 ± 2) °C

After immersion, remove the cleaning product with water and storage the test pieces for (24 ± 4) h at

a temperature of (23 ± 2) °C and (50 ± 5) % relative humidity

Subject the test pieces to the tensile test in accordance with EN ISO 8339 at (23 ± 2) °C

Evaluation:

sealant for structural purposes:

 stress at the breaking point as measured in accordance with 5.3.3 at +23 °C: ∆Xmean≥ 0,75

 rupture shall be at least of 90 % cohesive

sealant for structural purposes:

 stress at the breaking point as measured in accordance with 5.3.3 at +23°C: ∆Xmean≥ 0,75

 rupture shall be at least of 90 % cohesive

5.5 Water vapour transmission and gas transmission

For sealants intended to be used in insulating glass unit edge seals this information can be made available Determined for these properties in accordance with EN 1279-4

The water vapour transmission and gas transmission are independent of the production equipment used, provided that a factory production control in accordance with Annex C is in use

5.7 Dangerous substances

The necessary investigation on dangerous substances shall be performed

The presence of dangerous substances is independent of the production equipment used, provided that a factory production control in accordance with Annex C is in use

5.8 Outer seal of insulating glass unit category differentiation

The category differentiation is applicable for the outer sealants of insulating glass unit without structural function as in the situation 1 of the Scope of EN 13022-1:2006

The category differentiation is based on:

 function: non structural;

 conformity to the specifications associated to the three levels A, B and C of UV exposure of the test method

Refer to the Annex D for:

6 Sealing and bonding

Sealing means: no structural function and exposure to the UV

Bonding means: structural function and exposure to the UV

The exposure to the UV depends on the situation

Refer to Annex F for illustrations

NOTE When bonding of sealant to a non glass substrate is tested, the substrate, which means the material, its treatment and its preparations for bonding, as applied or to be applied on the work shall be used in testing (coating of coated glass is considered as a non glass substrate)

For details of bonding of sealant to non glass substrates, see Annex G

Where a European Technical Approval (ETA) applies, refer to the concerned ETA

7 Compatibility with adjacent material

Purpose and principle of the test

Two test methods are proposed to verify compatibility Due consideration shall be given to the risk of

UV exposure in service In some cases, it may be necessary to apply both tests

a) Method without UV

Test specimens: description, conditioning and number:

Seven test pieces prepared as shown in Figure 6 and conditioned at a temperature of (60 ± 2) °C and (95 ± 5) % relative humidity, five for 28 days and the remaining two for 56 days

Key

(1) bond breaker

(2) structural sealant

(3) gasket, sealant, other material

Figure 6 — Typical test specimen for compatibility test

Testing:

The test specimens shall be tested as follows:

• Mechanical strength: Five test pieces shall be subjected to the tensile test in accordance with 5.3.3 after 28 days conditioning The material to be tested for compatibility should be removed before the tensile test so that the results relate only to the bond between the structural sealant and glass and to the structural sealant itself

If the two materials in the samples cannot be separated without damage it will be necessary

to make five additional samples and to test these, as controls, with the secondary material in place and without conditioning

• Effect on colour: Two test pieces shall be examined for discolouration every 14 days throughout the 56 days conditioning period

Evaluation:

• R u,5 after conditioning ≥ 0,85 R u,5 initial

• no discoloration permitted

b) Method with UV

 Test specimen description and test procedure

Five tests pieces are prepared as shown in Figure 7

The test specimens shall be conditioned for 28 days at (23 ± 2) °C and (50 ± 5) % RH, or in conformity with the specification of the sealant’s manufacturer

Products 2 and 3 are sealants with which compatibility with product n°1 is being checked

After 1 to 3 days of cure of the various products, the test pieces shall be submitted to irradiation using

a UV lamp:

• type of lamp: Xenon according to EN ISO 4892-2 or equivalent;

• power: (60 ± 5) W/m² measured at the level of the sample, and between 300 nm and

a) Peel test with strips of cloth

b) Peel test with incision

Testing:

 peel test with strips of cloth:

The samples are placed in a tensile test machine and the embedded cloth is peeled back at 180° to the substrate

 peel test with incisions:

Clean incisions are made at the interface of the substrate and the products n° 2 and n° 3

The sealant beads are manually peeled back at 180° to the substrate

Any signs of staining in the pale-colour sealant are noted

Evaluation:

- no discoloration by visual observation

- peel test requirement : no adhesive rupture permitted

8 Evaluation of conformity

8.1 General or scope

This clause covers the evaluation of conformity and the factory production control of structural and/or ultra-violet resistant sealant (for use with structural sealant glazing and/or insulating glass units with exposed seals)

8.2 Requirements

8.2.1 Product description

The product description shall be in conformity with 4.2 of this European Standard

8.2.2 Conformity with the definition of sealant

Products shall conform to the definition and fulfil the requirements of sealant as defined in 5.2, 5.3 and 5.4 of this European Standard

8.2.3 Determination of the characteristic’s performances

8.2.3.1 Characteristics of the sealant product made in accordance with this European

Standard

The characteristics listed in Table 4, concern general accepted values, calculated values or measured values

Table 4 — Necessary information on characteristics of ultra-violet resistant sealant and

structural sealant

Generally accepted values:

-Thermogravimetry analysis curve

- Specific gravity

- Shore A hardness

- Change in volume

- Infrared spectrometer analysis

- Breaking force in tensile test

- Breaking force in shear test

- Elastic recovery

- Tear strength

- Breaking force after mechanical cyclic load

- Displacement under permanent shear load

- Elastic modulus

- Breaking force in tensile test after exposure to artificial light

through glass and to water

- Breaking force after exposure to salt spray

- Breaking force after exposure to SO2

- Breaking force after conditioning at 100°C

- Gas vapour transmission and gas transmission

– – – – –

% MPa MPa

mm MPa MPa

MPa MPa MPa g(H2O)·m-2·(24 h)-1·(2 mm)-1

8.2.3.2 Determination of essential characteristics of sealant product

If the sealant manufacturer wishes to claim that any performance characteristic is independent of the production equipment used then the factory production control system shall be in accordance with this standard including his specific process control conditions

8.2.3.3 Safety in the case of fire - reaction to fire

Reaction to fire shall be determined and classified in accordance with EN 13501-1

8.2.4 Durability

When products conform to the definition of sealant as in 8.2.2, the characteristic’s performances in 8.2.3.1 are ensured during an economically reasonable working life

The durability of sealants, including their characteristics, shall be ensured by the following:

 compliance with this European Standard;

 compliance with instructions from the sealant manufacturer or supplier

The manufacturer shall supply specific installation instructions or make reference to appropriate technical specifications

 deflection and racking of the glass support due to various actions;

 glass support design (e.g drainage of infiltrated water in the rebate);

 accuracy of glass support and glass support member dimensions;

 quality of the assembling of glass support members up to a glass support;

 quality of installation of the glass support into or onto the buildings or constructions;

 glass support expansion due to adsorbed moisture from the air or other sources;

 quality of installation of the glass product into or onto its support;

 compatibility with adjacent material;

 section of the joint: minimum, maximum and values compatible with the effective movements

8.2.5 Dangerous substances

Materials used in products shall not release any dangerous substances in excess of the maximum permitted levels specified in a relevant European Standard for the material or permitted in the national regulations of the member state of destination

1) factory production control:

this shall include, the following:

a) inspection of samples taken at the factory in accordance with a prescribed test plan;

b) initial inspection of the factory and of factory production control;

c) continuous surveillance and assessment of the factory production control;

2) initial type testing of the product

NOTE There may be a need to involve a third party, with 1b, 1c, and/or 2, for the purpose of regulatory marking

8.3.2 Initial type testing of the product (see Clause 5)

8.3.3 General

8.3.3.1 General remarks

All the product’s characteristics shall be initial type tested to verify they are in conformity with the requirements of this European Standard Instead of performing any actual testing, initial type testing may make use of:

 generally accepted and/or conventional and/or standardised values, in Clause 5 referenced standards, or in publications that are referred to in these standards;

 standardised calculation methods and recognised calculation methods in Clause 5 referenced standards, or in publications that are referred to in these standards;

 test report(s) on the basis of 5.2 when made available

where components are used whose characteristics have already been determined, by the component manufacturer, on the basis of conformity with other product standards, these characteristics need not

be reassessed providing they remain unchanged by the manufacturing process;

 release of dangerous substances may be assessed indirectly by controlling the content of the substance concerned;

 durability may be assessed indirectly by controlling the production processes according to this standard

NOTE 1 Products CE marked in accordance with appropriate harmonised European specifications may be presumed to have the performances stated with the CE marking

NOTE 2 There may be a need to involve a third party for the purpose of regulatory marking

When actual testing is required then the Initial Type Testing (ITT) shall be undertaken on a sample representative of the product taken from direct production or a prototype, any plant and/ or line

Whenever a change occurs in the raw material or production process (subject to the definition of a family), which would change significantly one or more of the characteristics, the type tests shall be repeated for the appropriate characteristic(s)

8.3.3.3 Historic data

(a) For all characteristics except those listed in 8.2.3 the following applies:

Tests previously performed in accordance with the provisions of this European Standard (same product, same characteristic(s), same or more onerous test method, sampling method and attestation

of conformity) may be taken into account

(b) For characteristics listed in 8.2.3, the following applies:

Tests previously performed in accordance with the provisions of this European Standard may be taken into account when all of the following conditions are met:

1) Notified Body has confirmed the results of tests conducted by a non-notified body and is satisfied with the competence of the testing body

2) Tests have been conducted in accordance with a prEN version that shall not be materially different

from the European Standard

3) Test work has been completed before the end of the transition period, i.e within 21 months of the date of availability of this European Standard

8.3.3.4 Initial type testing of characteristic’s performances

To establish if a product conforms to the definition of insulating glass units initial type testing shall consist of fulfilling the requirements of 5.3 through 5.8 of this European Standard

8.4 Factory production control and inspection of samples in accordance with a

prescribed test plan (8.3.1.1, 1 a) and 1 b))

Factory production control shall be according to Annex C of this European Standard

NOTE 1 A factory production control system similar to EN ISO 9001 made product specific to this European Standard is deemed to satisfy the requirements of this clause

NOTE 2 There may be a need to involve a third party for the purpose of regulatory marking

Annex C of this European Standard also summarises the tests that shall be carried out by the manufacturer as part of the production control in the factory, and as further testing of samples taken at the factory in accordance with a prescribed test plan

8.4.2 Initial inspection of factory and of factory production control (8.3.1.1 1 b))

The initial inspection of the factory and of the factory production control shall be limited to the parameters listed in Table 5 in conjunction with Annex C

NOTE There may be a need to involve a third party for the purpose of regulatory marking