ASTM C1442-11
(Practice)Standard Practice for Conducting Tests on Sealants Using Artificial Weathering Apparatus
Standard Practice for Conducting Tests on Sealants Using Artificial Weathering Apparatus
SIGNIFICANCE AND USE
This practice determines the effects of actinic radiation, elevated temperature, and moisture on sealants and their constituents under controlled laboratory artificial weather test conditions.
When conducting exposures in devices which use laboratory light sources, it is important to consider (1) how well the artificial test conditions will reproduce property changes and failure modes caused by end-use environments on the sealant being tested and (2) the stability ranking of sealants. Refer to Practice G151 for full cautionary guidance regarding laboratory weathering.
Because of differences in the spectral power distributions of the exposure sources (xenon arc, fluorescent UV lamps, and open flame carbon arc), as well as other conditions used in the three types of laboratory weathering tests, including temperature, type and amount of moisture, and test cycles, these three procedures may not result in the same performance ranking or types of failure modes of sealants. Further, different exposure durations may be required for testing the weathering performance of sealants by the three types of exposures. Comparisons should not be made of the relative stability of sealants exposed in the different types of apparatus.
Variations in results may be expected when operating conditions are varied within the accepted limits of this practice. Therefore, all test results using this practice must be accompanied by a report of the specific operating conditions as required in Section 10. Refer to Practice G151 for detailed information on the caveats applicable to use of results obtained according to this practice.
No laboratory exposure test can be specified as a total simulation of actual use conditions in outdoor environments. The relative durability of materials in actual use conditions can vary in different locations because of differences in UV radiation, time of wetness, relative humidity, temperature, pollutants, and other factors. Results obtained from these labora...
SCOPE
1.1 This practice covers three types of laboratory weathering exposure procedures for evaluating the effect of actinic radiation, heat, and moisture on sealants.
1.2 The exposure sources used in the three types of artificial weathering devices are the filtered xenon arc, fluorescent ultraviolet lamps, and open flame carbon arc based on Practices G155, G154, and G152, respectively.
1.3 The values stated in SI units are to be regarded as the standard. The values given in parentheses are provided for information only.
1.4 The ISO standard related to this Practice is ISO 11431. Significant differences exist between the procedures. The ISO specimens are exposed through glass and are elongated prior to examination for loss of adhesion or cohesion, or both, following exposure.
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 and health practices and determine the applicability of regulatory limitations prior to use.
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Designation:C1442 −11
StandardPractice for
Conducting Tests on Sealants Using Artificial Weathering
1
Apparatus
This standard is issued under the fixed designation C1442; 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 G151 Practice for Exposing Nonmetallic Materials inAccel-
erated Test Devices that Use Laboratory Light Sources
1.1 This practice covers three types of laboratory weather-
G152 Practice for Operating Open Flame Carbon Arc Light
ing exposure procedures for evaluating the effect of actinic
Apparatus for Exposure of Nonmetallic Materials
radiation, heat, and moisture on sealants.
G154 PracticeforOperatingFluorescentLightApparatusfor
1.2 The exposure sources used in the three types of artificial
UV Exposure of Nonmetallic Materials
weathering devices are the filtered xenon arc, fluorescent
G155 Practice for Operating XenonArc LightApparatus for
ultravioletlamps,andopenflamecarbonarcbasedonPractices
Exposure of Non-Metallic Materials
G155, G154, and G152, respectively.
2.2 ISO Standard:
1.3 The values stated in SI units are to be regarded as the ISO 11431 Building Construction—Sealants: Determination
standard. The values given in parentheses are provided for of Adhesion/Cohesion Properties After Exposure to Heat
3
information only. and Artificial Light Through Glass and to Moisture
1.4 The ISO standard related to this Practice is ISO 11431.
3. Terminology
Significant differences exist between the procedures. The ISO
3.1 Definitions—Definitions of the following terms are
specimensareexposedthroughglassandareelongatedpriorto
found in Terminology C717: compound, cure, sealant, sub-
examination for loss of adhesion or cohesion, or both, follow-
strate. Definitions of the following terms are found in Termi-
ing exposure.
nologyG113: actinic radiation, control material, file specimen,
1.5 This standard does not purport to address all of the
fluorescent ultraviolet lamps, irradiance, open flame carbon
safety concerns, if any, associated with its use. It is the
arc, radiant exposure, sample, solar radiation-ultraviolet,
responsibility of the user of this standard to establish appro-
solar radiation-visible, spectral power distribution, xenon arc.
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use.
4. Summary of Practice
4.1 The test sealant may be applied to a variety of types of
2. Referenced Documents
substratesortestedasafreefilm.Theconfigurationdependson
2
2.1 ASTM Standards:
the properties to be evaluated following exposure.At least four
C717 Terminology of Building Seals and Sealants
replicates of each sealant being tested are required. After
G113 Terminology Relating to Natural andArtificial Weath-
curing, one replicate of each sealant being tested is retained as
ering Tests of Nonmetallic Materials
an unexposed file specimen and three replicates are exposed to
G141 Guide for Addressing Variability in Exposure Testing
actinicradiation,heat,andmoisture.Attheendoftheexposure
of Nonmetallic Materials
period, the test sealant is examined for property change in
G147 Practice for Conditioning and Handling of Nonmetal-
comparison with the unexposed file specimen and the perfor-
lic Materials for Natural and Artificial Weathering Tests
mance is compared with that of an exposed control material, if
used.
4.2 It is recommended that a similar material of known
1
This practice is under the jurisdiction of ASTM Committee C24 on Building
Seals and Sealants and is the direct responsibility of Subcommittee C24.40 on performance under use conditions (a control) be exposed
Weathering.
simultaneously with the test specimen for evaluation of the
Current edition approved April 1, 2011. Published April 2011. Originally
performance of the test materials relative to that of the control
approved in 1999. Last previous edition approved in 2006 as C1442 – 06. DOI:
under the same laboratory exposure conditions. It is preferable
10.1520/C1442-11.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
3
Standards volume information, refer to the standard’s Document Summary page on Available fromAmerican National Standards Institute (ANSI), 25 W. 43rd St.,
the ASTM website. 4th Floor, New York, NY 10036.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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C1442−11
tousetwocontrolmaterials,onewithrelativelypoordurability G154, and G155. Significant factors inclu
...
This document is not anASTM standard and is intended only to provide the user of anASTM 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:C1442–06 Designation: C1442 – 11
Standard Practice for
Conducting Tests on Sealants Using Artificial Weathering
1
Apparatus
This standard is issued under the fixed designation C1442; 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 practice covers three types of laboratory weathering exposure procedures for evaluating the effect of actinic radiation,
heat, and moisture on sealants.
1.2 Theexposuresourcesusedinthethreetypesofartificialweatheringdevicesarethefilteredxenonarc,fluorescentultraviolet
lamps, and open flame carbon arc based on Practices G155, G154, and G152, respectively.
1.3 ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareprovidedforinformation
only.
1.4 The ISO standard related to this Practice is ISO 11431. Significant differences exist between the procedures. The ISO
specimens are exposed through glass and are elongated prior to examination for loss of adhesion or cohesion, or both, following
exposure.
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 and health practices and determine the applicability of regulatory
limitations prior to use.
2. Referenced Documents
2
2.1 ASTM Standards:
C717 Terminology of Building Seals and Sealants
G113 Terminology Relating to Natural and Artificial Weathering Tests of Nonmetallic Materials
G141 Guide for Addressing Variability in Exposure Testing of Nonmetallic Materials
G147 Practice for Conditioning and Handling of Nonmetallic Materials for Natural and Artificial Weathering Tests
G151 Practice for Exposing Nonmetallic Materials in Accelerated Test Devices that Use Laboratory Light Sources
G152 Practice for Operating Open Flame Carbon Arc Light Apparatus for Exposure of Nonmetallic Materials
G154 Practice for Operating Fluorescent Light Apparatus for UV Exposure of Nonmetallic Materials
G155 Practice for Operating Xenon Arc Light Apparatus for Exposure of Non-Metallic Materials
2.2 ISO Standard:
ISO 11431 Building Construction—Sealants: Determination of Adhesion/Cohesion Properties After Exposure to Heat and
3
Artificial Light Through Glass and to Moisture
3. Terminology
3.1 Definitions—Definitions of the following terms are found in Terminology C717: compound, cure, sealant, substrate.
Definitions of the following terms are found in Terminology G113: actinic radiation, control material, file specimen, fluorescent
ultraviolet lamps, irradiance, open flame carbon arc, radiant exposure, sample, solar radiation-ultraviolet, solar radiation-visible,
spectral power distribution, xenon arc.
4. Summary of Practice
4.1 The test sealant may be applied to a variety of types of substrates or tested as a free film. The configuration depends on the
properties to be evaluated following exposure.At least four replicates of each sealant being tested are required.After curing, one
replicateofeachsealantbeingtestedisretainedasanunexposedfilespecimenandthreereplicatesareexposedtoactinicradiation,
1
This practice is under the jurisdiction ofASTM Committee C24 on Building Seals and Sealants and is the direct responsibility of Subcommittee C24.40 on Weathering.
Current edition approved Jan.April 1, 2006.2011. Published February 2006.April 2011. Originally approved in 1999. Last previous edition approved in 20032006 as
C1442 – 036. DOI: 10.1520/C1442-06.10.1520/C1442-11.
2
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
3
Available from American National Standards Institute (ANSI), 25 W. 43rd St., 4th Floor, New York, NY 10036.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1
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C1442 – 11
heat, and moisture. At the end of the exposure period, the test sealant is examined for property change in comparison with the
unexposed file specimen and the performance is compared with that of an exposed control material, if used.
4.2 Itisrecommendedthatasimilarmaterialofknownperformanceunderuseconditions(acontro
...
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