ASTM C736-12(2017)

Standard Test Method for Extension-Recovery and Adhesion of Latex Sealants

SIGNIFICANCE AND USE
5.1 This test method evaluates the performance of a latex sealant in joints subjected to a limited amount of extension.
SCOPE
1.1 This test method covers a laboratory procedure for the determination of the extension-recovery and adhesion of latex sealants.  
1.2 The values stated in SI (metric) units are to be regarded as the standard. The values given in parentheses are provided for information only.  
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 and health practices and determine the applicability of regulatory limitations prior to use.
Note 1: A related ISO standard is ISO 7389. Users should compare to determine how the ISO standard differs from 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: Historical
• Publication Date: 31-May-2017
• ICS: 91.100.50 - Binders. Sealing materials
• Technical Committee: C24 - Building Seals and Sealants
• Drafting Committee: C24.30 - Adhesion

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: C736 − 12 (Reapproved 2017)
Standard Test Method for
1
Extension-Recovery and Adhesion of Latex Sealants
This standard is issued under the fixed designation C736; 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 3. Terminology
3.1 Definitions—Refer to Terminology C717 for definitions
1.1 This test method covers a laboratory procedure for the
of the terms used in this test method.
determination of the extension-recovery and adhesion of latex
sealants.
4. Summary of Test Method
1.2 The values stated in SI (metric) units are to be regarded
4.1 A joint of prescribed dimensions, between glass and
as the standard. The values given in parentheses are provided
aluminum plates is filled with the sealant. After an aging
for information only.
period, the joint width is increased 25 %, the force is removed,
and the specimen is permitted to recover. The amount of
1.3 This standard does not purport to address all of the
recovery and the percent of adhesion loss are measured.
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro-
5. Significance and Use
priate safety and health practices and determine the applica-
5.1 This test method evaluates the performance of a latex
bility of regulatory limitations prior to use.
sealant in joints subjected to a limited amount of extension.
NOTE 1—Arelated ISO standard is ISO 7389. Users should compare to
determine how the ISO standard differs from this test method.
6. Apparatus
1.4 This international standard was developed in accor-
6.1 Extension Machine that can be operated at a steady rate
dance with internationally recognized principles on standard-
of12.7mm/min(0.5in./min)andheldatconstantextensionfor
ization established in the Decision on Principles for the
5 min.
Development of International Standards, Guides and Recom-
6.2 Aluminum Alloy Plates, six, anodized, 6.4 by 25.4 by
mendations issued by the World Trade Organization Technical
1
76.2 mm ( ⁄4 by 1 by 3 in.). Plates shall conform to Guide
Barriers to Trade (TBT) Committee.
C1375.
1
6.3 Glass Plates, six, 6.4 by 25.4 by 76.2 mm ( ⁄4 by1by
2. Referenced Documents
3 in.). Plates shall conform to Guide C1375.
2
2.1 ASTM Standards:
6.4 U Shaped Spacers, six, as shown in Fig. 1(a) made of a
C717 Terminology of Building Seals and Sealants
rigid, nonadhering material such as polyethylene, TFE-
C1375 Guide for Substrates Used in Testing Building Seals
fluorocarbon, or release-covered metal.
and Sealants
6.5 Metal C Clamps, twelve.
3
2.2 ISO Standard:
6.6 Circulating Air Oven, capable of maintaining 50 6 1°C
ISO 7389 Building Construction–Sealants–Determination of
(122 6 2°F).
Elastic Recovery
7. Sampling
7.1 Take the sealant to be tested directly from the container
1
ThistestmethodisunderthejurisdictionofASTMCommitteeC24onBuilding
as commercially supplied by the manufacturer.
Seals and Sealantsand is the direct responsibility of Subcommittee C24.30 on
Adhesion.
8. Test Specimens
Current edition approved June 1, 2017. Published June 2017. Originally
approved in 1972. Last previous edition approved in 2012 as C736 – 12. DOI:
8.1 Prepare a test specimen as follows: Apply a bead of
10.1520/C0736-12R17.
1 1
2
sealant, 12.7 by 12.7 by 50.8 mm ( ⁄2 by ⁄2 by 2 in.) between
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
parallel glass and anodized aluminum plates as shown in Fig.
Standards volume information, refer to the standard’s Document Summary page on
1(b), using rigid, nonadhering spacer bars. Use the C-clamps to
the ASTM website.
3
hold the test assembly during the filling and subsequent curing
Available from theAmerican National Standards Institute, 11 W. 42nd St., 13th
Floor, New York, NY 10036. and handling of the specimens.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

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C736 − 12 (2017)
detergent solution and a final rinse with distilled or deionized water and
then air dried prior to assembly of specimens.
9. Conditioning
9.1 Cure the six test specimens for 7 days at standard
conditions, then for 7 days at 50 6 1°C (122 6 2°F).After the
14-day cure period, condition the specimens for2hat standard
conditions.
10. Procedure
10.1 Remove the spacers (Fig. 1(c)) and insert each speci-
men in turn in the extension machine. At the rate of 12.7
mm/min (0.5 in./min), extend the joint width 25 % to 15.9 mm
(0.625 in.) and
...

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: C736 − 12 C736 − 12 (Reapproved 2017)
Standard Test Method for
1
Extension-Recovery and Adhesion of Latex Sealants
This standard is issued under the fixed designation C736; 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 covers a laboratory procedure for the determination of the extension-recovery and adhesion of latex
sealants.
1.2 The values stated in SI (metric) units are to be regarded as the standard. The values given in parentheses are provided for
information only.
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 and health practices and determine the applicability of regulatory
limitations prior to use.
NOTE 1—A related ISO standard is ISO 7389. Users should compare to determine how the ISO standard differs from 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.
2. Referenced Documents
2
2.1 ASTM Standards:
C717 Terminology of Building Seals and Sealants
C1375 Guide for Substrates Used in Testing Building Seals and Sealants
3
2.2 ISO Standard:
ISO 7389 Building Construction–Sealants–Determination of Elastic Recovery
3. Terminology
3.1 Definitions—Refer to Terminology C717 for definitions of the terms used in this test method.
4. Summary of Test Method
4.1 A joint of prescribed dimensions, between glass and aluminum plates is filled with the sealant. After an aging period, the
joint width is increased 25 %, the force is removed, and the specimen is permitted to recover. The amount of recovery and the
percent of adhesion loss are measured.
5. Significance and Use
5.1 This test method evaluates the performance of a latex sealant in joints subjected to a limited amount of extension.
6. Apparatus
6.1 Extension Machine that can be operated at a steady rate of 12.7 mm/min (0.5 in./min) and held at constant extension for
5 min.
1
6.2 Aluminum Alloy Plates, six, anodized, 6.4 by 25.4 by 76.2 mm ( ⁄4 by 1 by 3 in.). Plates shall conform to Guide C1375.
1
6.3 Glass Plates, six, 6.4 by 25.4 by 76.2 mm ( ⁄4 by 1 by 3 in.). Plates shall conform to Guide C1375.
1
This test method is under the jurisdiction of ASTM Committee C24 on Building Seals and Sealantsand is the direct responsibility of Subcommittee C24.30 on Adhesion.
Current edition approved June 1, 2012June 1, 2017. Published June 2012June 2017. Originally approved in 1972. Last previous edition approved in 20062012 as
ε1
C736 – 00C736 – 12.(2006) . DOI: 10.1520/C0736-12.10.1520/C0736-12R17.
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.
3
Available from the American National Standards Institute, 11 W. 42nd St., 13th Floor, New York, NY 10036.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
C736 − 12 (2017)
6.4 U Shaped Spacers, six, as shown in Fig. 1(a) made of a rigid, nonadhering material such as polyethylene, TFE-fluorocarbon,
or release-covered metal.
6.5 Metal C Clamps, twelve.
6.6 Circulating Air Oven, capable of maintaining 50 6 1°C (122 6 2°F).
7. Sampling
7.1 Take the sealant to be tested directly from the container as commercially supplied by the manufacturer.
8. Test Specimens
1 1
8.1 Prepare a test specimen as follows: Apply a bead of sealant, 12.7 by 12.7 by 50.8 mm ( ⁄2 by ⁄2 by 2 in.) between parallel
glass and anodized aluminum plates as shown in Fig. 1(b), using rigid, nonadhering spacer bars. Use the C-clamps to hold the test
assembly during the filling and subsequent curing and handling of the specimens.
8.2 Prepare five additional specimens as described in 8.1.
NOTE 2—The glass and aluminum plates shall be cleaned with methyl ethyl ketone or similar solvent followed by a
...