ASTM C1501-23

Standard Test Method for Color Stability of Building Construction Sealants as Determined by Laboratory Accelerated Weathering Procedures

SIGNIFICANCE AND USE
5.1 This test method is intended to induce color changes in sealants, as well as their constituent pigments, associated with end-use conditions, including the effects of sunlight, moisture, and heat. The exposures used in this test method are not intended to simulate the color change of a sealant caused by localized weathering phenomena, such as atmospheric pollution, biological attack, or saltwater exposure.  
5.2 When conducting exposures in devices that use laboratory light sources, it is important to consider how well the artificial test conditions will reproduce property changes and failure modes associated with end-use environments for the sealant being tested. Information on the use and interpretation of data from accelerated exposure tests is provided in Practice G151.  
5.3 When this test method is used as part of a specification, exact procedure, test conditions, test duration and evaluation technique must be specified. Results obtained between the two procedures may vary, because the spectral power distribution of the light sources (fluorescent UV and xenon arc) differ. Sealants should not be compared to each other based on the results obtained in different types of apparatus.  
5.4 These devices are capable of matching ultraviolet solar radiation reasonably well. However, for sealants sensitive to long wavelength UV and visible solar radiation, the absence of this radiation in the fluorescent UV apparatus can distort color stability ranking when compared to exterior environment exposure.
Note 1: Refer to Practice G151 for full cautionary guidance regarding laboratory weathering of non-metallic materials.
SCOPE
1.1 This test method describes laboratory accelerated weathering procedures using either fluorescent ultraviolet or xenon arc test devices for determining the color stability of building construction sealants.  
1.2 Color stability rankings provided by these two procedures may not agree.  
1.3 The values stated in SI units are to be regarded as the standard. Values given in parentheses are for information only.  
1.4 There is no equivalent ISO standard for this test method.  
1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

General Information

• Status: Published
• Publication Date: 31-May-2023
• ICS: 91.120.30 - Waterproofing
• Technical Committee: C24 - Building Seals and Sealants
• Drafting Committee: C24.40 - Weathering

Standards Content (Sample)

This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: C1501 − 23
Standard Test Method for
Color Stability of Building Construction Sealants as
Determined by Laboratory Accelerated Weathering
1
Procedures
This standard is issued under the fixed designation C1501; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope Color Differences from Instrumentally Measured Color
Coordinates
1.1 This test method describes laboratory accelerated
E284 Terminology of Appearance
weathering procedures using either fluorescent ultraviolet or
E691 Practice for Conducting an Interlaboratory Study to
xenon arc test devices for determining the color stability of
Determine the Precision of a Test Method
building construction sealants.
E177 Practice for Use of the Terms Precision and Bias in
1.2 Color stability rankings provided by these two proce-
ASTM Test Methods
dures may not agree.
E1164 Practice for Obtaining Spectrometric Data for Object-
1.3 The values stated in SI units are to be regarded as the Color Evaluation
G113 Terminology Relating to Natural and Artificial Weath-
standard. Values given in parentheses are for information only.
ering Tests of Nonmetallic Materials
1.4 There is no equivalent ISO standard for this test method.
G151 Practice for Exposing Nonmetallic Materials in Accel-
1.5 This standard does not purport to address all of the
erated Test Devices that Use Laboratory Light Sources
safety concerns, if any, associated with its use. It is the
G154 Practice for Operating Fluorescent Ultraviolet (UV)
responsibility of the user of this standard to establish appro-
Lamp Apparatus for Exposure of Materials
priate safety, health, and environmental practices and deter-
G155 Practice for Operating Xenon Arc Lamp Apparatus for
mine the applicability of regulatory limitations prior to use.
Exposure of Materials
1.6 This international standard was developed in accor-
2.2 CIE Documents:
dance with internationally recognized principles on standard-
CIE Publication Number 85: 1989, Technical Report-Solar
ization established in the Decision on Principles for the
3
Spectral Irradiance
Development of International Standards, Guides and Recom-
mendations issued by the World Trade Organization Technical
3. Terminology
Barriers to Trade (TBT) Committee.
3.1 Definitions—Definitions of the following terms are
2. Referenced Documents found in Terminology C717: standard conditions, compound,
2 cure, sealant, and substrate. Definitions of the following terms
2.1 ASTM Standards:
are found in Terminology G113: sample, file specimen, control,
C717 Terminology of Building Seals and Sealants
fluorescent ultraviolet lamp, xenon arc, irradiance, radiant
C1442 Practice for Conducting Tests on Sealants Using
exposure, spectral power distribution.
Artificial Weathering Apparatus
D1729 Practice for Visual Appraisal of Colors and Color
4. Summary of Test Method
Differences of Diffusely-Illuminated Opaque Materials
4.1 Specimens for this procedure are prepared in which the
D2244 Practice for Calculation of Color Tolerances and
sealant to be tested adheres to flat aluminum panels. While any
surface can be specified and used, this test method was
1
This test method is under the jurisdiction of ASTM Committee C24 on Building
developed with aluminum panels. At least four replicates of
Seals and Sealants and is the direct responsibility of Subcommittee C24.40 on
each sealant being tested are required. After curing, one
Weathering.
replicate of each sealant being tested is retained as a file
Current edition approved June 1, 2023. Published July 2023. Originally approved
in 2001. Last previous edition approved in 2019 as C1501 – 19. DOI: 10.1520/ specimen and at least three replicates are exposed to actinic
C1501-23.
radiation, heat and moisture. At the end of the exposure period,
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on
3
the ASTM website. CIE Central Bureau, Vienna, Kegelgasse 27, A-1030 Wien, Austria
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
C1501 − 23
the test sealant is examined for color change by comparison to 6.5.2 Spectrophotometer, complying with Practice E1164;
the unexposed file specimen. or,
6.5.3 Colorimeter, co
...

This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: C1501 − 19 C1501 − 23
Standard Test Method for
Color Stability of Building Construction Sealants as
Determined by Laboratory Accelerated Weathering
1
Procedures
This standard is issued under the fixed designation C1501; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope
1.1 This test method describes laboratory accelerated weathering procedures using either fluorescent ultraviolet or xenon arc test
devices for determining the color stability of building construction sealants.
1.2 Color stability rankings provided by these two procedures may not agree.
1.3 The values stated in SI units are to be regarded as the standard. Values given in parentheses are for information only.
1.4 There is no equivalent ISO standard for this test method.
1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility
of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of
regulatory limitations prior to use.
1.6 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents
2
2.1 ASTM Standards:
C717 Terminology of Building Seals and Sealants
C1442 Practice for Conducting Tests on Sealants Using Artificial Weathering Apparatus
D1729 Practice for Visual Appraisal of Colors and Color Differences of Diffusely-Illuminated Opaque Materials
D2244 Practice for Calculation of Color Tolerances and Color Differences from Instrumentally Measured Color Coordinates
E284 Terminology of Appearance
E691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
E177 Practice for Use of the Terms Precision and Bias in ASTM Test Methods
E1164 Practice for Obtaining Spectrometric Data for Object-Color Evaluation
G113 Terminology Relating to Natural and Artificial Weathering Tests of Nonmetallic Materials
1
This test method is under the jurisdiction of ASTM Committee C24 on Building Seals and Sealants and is the direct responsibility of Subcommittee C24.40 on
Weathering.
Current edition approved May 1, 2019June 1, 2023. Published May 2019July 2023. Originally approved in 2001. Last previous edition approved in 20142019 as
C1501C1501 – 19.–14. DOI: 10.1520/C1501-19.10.1520/C1501-23.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
C1501 − 23
G151 Practice for Exposing Nonmetallic Materials in Accelerated Test Devices that Use Laboratory Light Sources
G154 Practice for Operating Fluorescent Ultraviolet (UV) Lamp Apparatus for Exposure of Materials
G155 Practice for Operating Xenon Arc Lamp Apparatus for Exposure of Materials
2.2 CIE Documents:
3
CIE Publication Number 85: 1989, Technical Report-Solar Spectral Irradiance
3. Terminology
3.1 Definitions—Definitions of the following terms are found in Terminology C717: standard conditions, compound, cure, sealant,
and substrate. Definitions of the following terms are found in Terminology G113: sample, file specimen, control, fluorescent
ultraviolet lamp, xenon arc, irradiance, radiant exposure, spectral power distribution.
4. Summary of Test Method
4.1 Specimens for this procedure are prepared in which the sealant to be tested adheres to flat aluminum panels. While any surface
can be specified and used, this test method was developed with aluminum panels. At least four replicates of each sealant being
tested are required. After curing, one replicate of each sealant being tested is retained as a file specimen and at least three replicates
are exposed to actinic radiation, heat and moisture. At the end of the exposure period, the test sealant is examined for color change
by comparison to the unexpos
...