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
- Status
- Published
- Publication Date
- 31-Dec-2021
- Technical Committee
- C24 - Building Seals and Sealants
- Drafting Committee
- C24.20 - General Test Methods
Relations
- Effective Date
- 01-Mar-2019
- Effective Date
- 01-Mar-2018
- Effective Date
- 01-Nov-2017
- Effective Date
- 01-Jan-2017
- Effective Date
- 15-Nov-2016
- Effective Date
- 01-Sep-2016
- Effective Date
- 01-May-2014
- Effective Date
- 01-Feb-2014
- Effective Date
- 01-Nov-2013
- Effective Date
- 01-Dec-2012
- Effective Date
- 01-May-2012
- Effective Date
- 15-Jan-2012
- Effective Date
- 01-Mar-2011
- Effective Date
- 15-Jan-2011
- Effective Date
- 15-Jun-2010
Overview
ASTM C731-15(2022), titled "Standard Test Method for Extrudability, After Package Aging, of Latex Sealants," is a key ASTM International standard that details laboratory procedures to determine the extrudability of latex sealants following exposure to freeze-thaw and heat cycling. This standard is essential for manufacturers and quality control professionals in the building, construction, and sealants industries to evaluate how easily a latex sealant can be applied after it has been subjected to simulated aging conditions. It is important to note that this method is designed to assess application ease and not the in-use performance of installed sealants.
Key Topics
- Extrudability Measurement: The standard provides a method to measure the rate at which latex sealant is extruded (in grams per second) from an air-powered caulking gun, simulating application from commercial packaging after aging.
- Freeze-Thaw and Heat Stability: ASTM C731-15(2022) addresses how latex sealants withstand cycles of freezing, thawing, and heat, reflecting common storage and shipping conditions.
- Laboratory Conditioning: Specific procedures require the sealant to undergo five freeze-thaw cycles, followed by seven days of heat exposure, prior to extrusion measurement.
- Equipment and Accuracy: The methodology specifies using SI units, standardized apparatus such as air-powered caulking guns, cartridges, and precise balances, ensuring results are reproducible and reliable.
- Safety and Compliance: Users must implement appropriate health, safety, and environmental practices, as the standard does not specify all potential hazards.
Applications
ASTM C731-15(2022) has high practical value in several situations:
- Quality Assurance in Manufacturing: Inspects whether latex sealants retain acceptable extrusion properties after simulated shipping and storage, supporting consistent product application.
- Product Development: Assists R&D teams in formulating sealants that maintain extrudability after package aging, helping meet market and regulatory demands.
- Technical Buyer Assurance: Provides a reliable method for end-users, contractors, and specifiers to compare extrusion ease among different latex sealants.
- Supply Chain Optimization: Enables manufacturers to anticipate the performance of products subjected to varying environmental conditions prior to installation.
Related Standards
When applying or referencing ASTM C731-15(2022), consider the following related ASTM standards for comprehensive sealant testing:
- ASTM C717 - Terminology of Building Seals and Sealants: Provides definitions for terms relevant to sealant testing, including those used in C731.
- Other Test Methods for Sealants: Although there is currently no ISO standard equivalent to C731, other ASTM C24 committee standards may address related performance characteristics such as adhesion, durability, and weather resistance.
Summary
ASTM C731-15(2022) establishes a standardized laboratory procedure for determining the extrudability of latex sealants after exposure to freeze-thaw and heat cycles, providing key insights into the ease of application after package aging. While this test method is not predictive of long-term installed performance, it is a valuable tool for assessing application characteristics and product stability, facilitating product improvement and robust quality assurance within the sealants industry. For additional technical coordination, users should also refer to related standards and maintain compliance with all safety and regulatory requirements.
Keywords: ASTM C731, extrudability, latex sealants, freeze-thaw stability, heat stability, package aging, sealant testing, construction industry, quality assurance, laboratory procedure.
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Frequently Asked Questions
ASTM C731-15(2022) is a standard published by ASTM International. Its full title is "Standard Test Method for Extrudability, After Package Aging, of Latex Sealants". This standard covers: 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.
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.
ASTM C731-15(2022) is classified under the following ICS (International Classification for Standards) categories: 91.100.50 - Binders. Sealing materials. The ICS classification helps identify the subject area and facilitates finding related standards.
ASTM C731-15(2022) has the following relationships with other standards: It is inter standard links to ASTM C717-19, ASTM C717-18, ASTM C717-17a, ASTM C717-17, ASTM C717-16a, ASTM C717-16, ASTM C717-14a, ASTM C717-14, ASTM C717-13, ASTM C717-12b, ASTM C717-12a, ASTM C717-12, ASTM C717-11a, ASTM C717-11, ASTM C717-10. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
ASTM C731-15(2022) is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
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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