ASTM C1519-10(2022)

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: C1519 − 10 (Reapproved 2022)
Standard Test Method for
Evaluating Durability of Building Construction Sealants by
Laboratory Accelerated Weathering Procedures
This standard is issued under the fixed designation C1519; 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 G113 Terminology Relating to Natural andArtificial Weath-
ering Tests of Nonmetallic Materials
1.1 This test method covers the method for the determina-
G141 Guide for Addressing Variability in Exposure Testing
tionofthedurabilityofasealantbasedonitsabilitytofunction
of Nonmetallic Materials
in cyclic movement maintaining adhesion and cohesion after
G151 Practice for Exposing Nonmetallic Materials inAccel-
repeated exposure to laboratory accelerated weathering proce-
erated Test Devices that Use Laboratory Light Sources
dures.
G154 Practice for Operating Fluorescent Ultraviolet (UV)
1.2 This test method describes two laboratory accelerated
Lamp Apparatus for Exposure of Nonmetallic Materials
weathering procedures for evaluating the durability of a
G155 Practice for Operating XenonArc LampApparatus for
sealant.
Exposure of Materials
1.3 RILEM TC139–DBS is related to this test method.
2.2 RILEM Standard:
RILEMTC139–DBS Determination of changes in adhesion,
1.4 This standard does not purport to address all of the
cohesion, and appearance of elastic weatherproofing seal-
safety concerns, if any, associated with its use. It is the
ants for high movement facade joints after exposure to
responsibility of the user of this standard to establish appro-
artificial weathering
priate safety, health, and environmental practices and deter-
mine the applicability of regulatory limitations prior to use.
3. Terminology
1.5 This international standard was developed in accor-
3.1 The definitions given in Terminology C717 on terms
dance with internationally recognized principles on standard-
relating to building seals and sealants and in Terminology
ization established in the Decision on Principles for the
G113 on terms relating to natural and artificial weathering tests
Development of International Standards, Guides and Recom-
are applicable to this test method.
mendations issued by the World Trade Organization Technical
Barriers to Trade (TBT) Committee.
4. Significance and Use
2. Referenced Documents
4.1 This test method describes the procedure to evaluate or
compare, or both, the durability of sealants when subjected to
2.1 ASTM Standards:
accelerated weathering and cyclic movement in a joint.
C717 Terminology of Building Seals and Sealants
C719 Test Method for Adhesion and Cohesion of Elasto-
4.2 Sealant installation procedures, design considerations
meric Joint Sealants Under Cyclic Movement (Hockman
and movement during cure affect the aging processes and are
Cycle)
fundamentaltothesuccessofanysealant.Thesefactorsarenot
C1442 Practice for Conducting Tests on Sealants Using
addressed with this test method.
Artificial Weathering Apparatus
4.3 The amount, type and frequency of movement a sealant
E177 Practice for Use of the Terms Precision and Bias in
experiences during its lifetime strongly depends on the mate-
ASTM Test Methods
rials used in construction and on the orientation of the joint
toward sunlight and many other factors that are not uniform or
ThistestmethodisunderthejurisdictionofASTMCommitteeC24onBuilding
consistent.
Seals and Sealants and is the direct responsibility of Subcommittee C24.40 on
4.4 Climatic exposures will differ with the orientation of the
Weathering.
Current edition approved June 15, 2022. Published July 2022. Originally
buildingandshadingaswellaswithlocalandregionalclimatic
approvedin2002.Lastpreviouseditionapprovedin2017asC1519–10(2017).DOI:
conditions. Climates in a given location can vary from year to
10.1520/C1519-17R22.
2 year because of differences in solar radiation, temperature,
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
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. Published in Materials and Structures, 2001, pp. 34, 579–588.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
C1519 − 10 (2022)
rainfall, and atmospheric conditions. Further, the quality and substrates as well. Substrates should be compatible with the
intensity of solar radiation on the earth’s surface varies with sealant, should not degrade under weathering, and should fit
geographic location, season, time of day, and cloud cover. into the joint movement apparatus. If primer is recommended
by the sealant manufacturer, it should be used in accordance
4.5 Variations in results may be expected when operating
with the manufacturer’s recommendations.
conditions are varied within the accepted limits of this test
method. Therefore, all test results using this test method must 6.2 Spacers, for the preparation of the specimens should be
beaccompaniedbyareportofthespecificoperatingconditions of a non-adherent material and of a shape to produce a sealant
as required in Section 11. Refer to Practice G151 for detailed joint as depicted in Test Method C719.
information on the caveats applicable to use of results obtained NOTE 2—If the spacers are made of a material to which the sealant
adheres, their surfaces should be made non-adherent, for example, by a
according to this test method.
thin wax coating.
4.6 The results of laboratory exposure cannot be directly
6.3 Non-Adherent Substance, for the preparation of test
extrapolated to estimate an absolute rate of deterioration
specimens, for example, polytetrafluoroethylene (PTFE) film
caused by natural weathering because the acceleration factor is
or vellum paper, preferably on the advice of the sealant
material dependent and can be significantly different for each
manufacturer.
material and for different formulations of the same material.
However, exposure of a similar material of known outdoor 6.4 Ventilated Convection-Type Oven, capable of being
maintained at 50 °C 6 2 °C.
performance, a control, along with the test specimens allows
comparison of the durability relative to that of the control
6.5 Artificial Weathering Device—Choice of type of appa-
under the test conditions. Evaluation in terms of relative
ratus and duration of exposure shall be by mutual agreement
durability also greatly improves the agreement in test results
among the interested parties. Because of differences in test
among different laboratories.
conditions, test results may differ with the type of apparatus
4.7 Results of this procedure will depend on the care that is used. Consult Practices G154 and G155 for differences in the
spectral power distributions of the exposure sources and
taken to operate the equipment according to Practices G154
and G155. Significant factors include regulation of the line Practice C1442 for the differences in test parameters in the two
types of apparatus specified.
voltage, freedom from salt or other deposits from water,
temperature control, humidity control, where applicable, con- 6.5.1 Fluorescent UV/Condensation Apparatus—Operate
dition and age of the burners and filters in xenon arc the device in accordance with Practice C1442, Section 7.3.
equipment, and age of lamps in fluorescent UV equipment. 6.5.2 Xenon Arc Light Apparatus—Operate the device in
NOTE 1—Additional information on sources of variability and on
accordance with Practice C1442, Section 7.2.
strategies for addressing variability in the design, execution and data
NOTE 3—The xenon arc ruggedness test was run at 70 % RH using an
analysis of laboratory accelerated exposure tests is found in Guide G141.
exposure cycle of 2 h light followed by 2 h light plus water spray for more
thorough wetting. The test results compared well with those of outdoor
5. Summary
exposures. Therefore, these conditions are considered an alternate to the
5.1 For this procedure, specimens are prepared in which the
default parameters.
sealant to be tested adheres to two parallel contact surfaces.
This procedure uses the same type of specimens, in the same
7. Preparation of Test Specimens
dimensions, and the same preparation and cure as described in
7.1 Adhere the sealant to be tested to two parallel contact
Test Method C719. While any substrates can be specified and
surfaces as described in Test Method C719. The user is to
used, this procedure was developed with anodized aluminum
specify the number of specimens.
substrates. Following cure, the specimens are placed in an
7.2 Unless specified otherwise, use anodized aluminum
artificial weathering chamber for 4 weeks. On removal from
substrates.
the weathering chamber, they are placed in a cyclic movement
machine and subjected to 6 cyclic movements of extension and
7.3 For each specimen, assemble two supports and two
compression at room temperature according to the method of
spacers as shown in Test Method C719 and set up on the
C719. Any degree of extension and compression can be used.
non-adherent substrate.
After the movement cycles the sealant is blocked open at the
7.4 Follow the instructions of the sealant manufacturer, for
recommended extension and examined for flaws. The cycle of
instance, whether a primer is to be used.
weathering followed by movement testing and examination is
repeated as often as specified. After each cycle, the number of 7.5 Fill the hollow space formed by supports and spacers
cycles is recorded as well as the mode of failure, that is,
shall be with sealant previously conditioned for 24 h at 23 °C
cohesive or adhesive, amount of failure, the depth of any 6 2 °C. The following precautions shall be taken:
cracks or breaks and other pertinent observations, such as
7.5.1 avoid the formation of air bubbles;
sealant deformation and bubble formation.
7.5.2 discardthefirst5gofsealantoutofthetube,cartridge
or dispenser;
6. Apparatus
7.5.3 press the sealant towards the contact surface of the
6.1 Aluminum Supports, for the preparation of test speci- supports; and
mens (two supports for each specimen).Anodized aluminum is 7.5.4 trim the sealant surfaces so that they are flush with the
the standard substrate, but this method can be used with other face of the supports and spacers.
C1519 − 10 (2022)
7.6 Backing materials and other joint formation aids should 10. Periods of Exposure and Evaluation of Results
beremovedassoonaspossible,consistentwithnodeformation
10.1 In most cases, periodic evaluation of materials is
of the sealant, to assist in the curing process.
necessary to determine when significant changes occur.
10.2 The time of radiant exposure necessary to produce a
8. Conditioning
defined change in a material property can be used to evaluate
8.1 The specimens shall be conditioned or cured following
or rank the stability of materials. This method is more reliable
the procedures of Test Method C719, Section 8.
than evaluating materials after an arbitrary exposure time or
radiant exposure.
9. Test Procedure
10.2.1 Exposure to an arbitrary time or radiant exposure
may be used for the purpose of a specific test if agreed upon by
9.1 After completion of 7.6 process, place the test speci-
the parties concerned or if required for conformance to a
mens in an artificial weathering device so that
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