ISO 19067:2026

International
Standard
ISO 19067
First edition
Building and civil engineering
2026-01
sealants — Determination of
changes in colour after laboratory
accelerated weathering procedures
Mastics pour le bâtiment et le génie civil — Détermination des
changements de couleur dans des conditions de vieillissement en
laboratoire
Reference number
© ISO 2026
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Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 1
5 Apparatus . 2
6 Preparation of test specimens . 3
7 Conditioning . 4
8 Procedure . 4
8.1 General .4
8.2 Colour value before exposure .4
8.3 Exposure conditions .4
8.4 Reposition of specimen .4
8.5 Colour value after exposure .5
8.6 Assessment of colour changes .5
9 Test report . 5
Bibliography . 7

iii
Foreword
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This document was prepared by Technical Committee ISO/TC 59, Buildings and civil engineering works,
Subcommittee SC 8, Sealants.
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iv
International Standard ISO 19067:2026(en)
Building and civil engineering sealants — Determination of
changes in colour after laboratory accelerated weathering
procedures
1 Scope
This document specifies a method for the determination of the changes in colour of opaque sealants after
laboratory accelerated weathering procedures using artificial light sources.
This document is not applicable to metallic, pearlescent, translucent or transparent sealants.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes
requirements of this document. For dated references, only the edition cited applies. For undated references,
the latest edition of the referenced document (including any amendments) applies.
ISO 6927, Building and civil engineering sealants — Vocabulary
ISO 4892-1:2024, Plastics — Methods of exposure to laboratory light sources — Part 1: General guidance and
requirements
ISO 4892-2:2013, Plastics — Methods of exposure to laboratory light sources — Part 2: Xenon-arc lamps
ISO/CIE 11664-1, Colorimetry — Part 1: CIE standard colorimetric observers
ISO/CIE 11664-2, Colorimetry — Part 2: CIE standard illuminants
ISO/CIE 11664-4, Colorimetry — Part 4: CIE 1976 L*a*b* colour space
CIE Publication No. 15, Colorimetry
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 6927 and ISO 4892-1 apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
4 Principle
Test specimens are prepared in which the sealant to be tested is applied to aluminium panels or glass panels.
At least three specimens of each sealant under evaluation shall be prepared. After conditioning, measure the
colour value of the specimens. Then, the specimens are exposed to artificial light, heat and moisture. At the
end of the exposure period, measure the colour value of exposed specimen sealant to examine the changes
in colour of the test sealant.

5 Appar
...