ASTM C731-15(2022)
(Test Method)Standard Test Method for Extrudability, After Package Aging, of Latex Sealants
Standard Test Method for Extrudability, After Package Aging, of Latex Sealants
SIGNIFICANCE AND USE
5.1 Extrudability measurements of latex sealants serve to indicate only their ease of application; they do not predict the performance capability of the compound after installation.
5.2 This test method also measures freeze-thaw and heat stability of such sealants.
SCOPE
1.1 This test method covers a laboratory procedure for the determination of extrudability of latex sealants after freeze-thaw and heat cycling.
1.2 The values stated in SI units are to be regarded as standard. The values given in parentheses after SI units are provided for information only and are not considered standard.
1.3 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.
Note 1: Currently there is no ISO standard similar to this test method.
1.4 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
Relations
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: C731 − 15 (Reapproved 2022)
Standard Test Method for
Extrudability, After Package Aging, of Latex Sealants
This standard is issued under the fixed designation C731; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope from an air-powered caulking gun, and the extrudability is
measured in grams per second.
1.1 This test method covers a laboratory procedure for the
determination of extrudability of latex sealants after freeze-
5. Significance and Use
thaw and heat cycling.
5.1 Extrudability measurements of latex sealants serve to
1.2 The values stated in SI units are to be regarded as
indicate only their ease of application; they do not predict the
standard. The values given in parentheses after SI units are
performance capability of the compound after installation.
provided for information only and are not considered standard.
5.2 This test method also measures freeze-thaw and heat
1.3 This standard does not purport to address all of the
stability of such sealants.
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro-
6. Apparatus
priate safety, health, and environmental practices and deter-
6.1 Caulking Gun, air-powdered.
mine the applicability of regulatory limitations prior to use.
6.2 Polyethylene Cartridge, 6 fluid oz and plunger.
NOTE 1—Currently there is no ISO standard similar to this test method.
6.3 Polyethylene Cartridge Nozzle, 64 mm (2 ⁄2 in.) in
1.4 This international standard was developed in accor-
length with 3mm ( ⁄8-in.) orifice.
dance with internationally recognized principles on standard-
6.4 Air Compressor, capable of producing 0.34 MPa
ization established in the Decision on Principles for the
(50psi).
Development of International Standards, Guides and Recom-
mendations issued by the World Trade Organization Technical
6.5 Freezer, capable of maintaining −17 °C 61°C
Barriers to Trade (TBT) Committee.
(0°F 62°F).
6.6 Circulating Air Oven, capable of maintaining
2. Referenced Documents
50°C 61°C (122°F 62°F).
2.1 ASTM Standards:
6.7 Stop Watch, standard laboratory.
C717Terminology of Building Seals and Sealants
6.8 Analytical Balance, accurate to 1g.
3. Terminology
6.9 Jar, approximately 0.5L (1-pt).
3.1 Definitions: Refer to Terminology C717 for definitions
6.10 Spatula.
of the following terms used in this test method: latex sealant,
sealant, standard conditions.
7. Sampling
7.1 Afterconditioningasspecifiedin8.1,takethesealantto
4. Summary of Test Method
betesteddirectlyfromacontainerascommerciallysuppliedby
4.1 After being subjected to 5 freeze-thaw cycles followed
the manufacturer.
by 7 days of heat aging, the sealant is extruded under pressure
8. Conditioning
8.1 Subject the sealant in its original container to 5 freeze-
ThistestmethodisunderthejurisdictionofASTMCommitteeC24onBuilding
thaw cycles, each cycle consisting of 16h at−17°C 61°C
Seals and Sealants and is the direct responsibility of Subcommittee C24.20 on
(0°F 6 2°F) and 8h at 23°C 6 1°C (73.4°F 6 2°F),
General Test Methods.
Current edition approved Jan. 1, 2022. Published January 2022. Originally followed by 7 days at 50°C 6 1°C (122°F 6 2°F).
approved in 1972. Last previous edition approved in 2015 as C731–15. DOI:
8.2 Condition the sealant which is still in its original
10.1520/C0731-15R22.
For referenced ASTM standards, visit the
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