ASTM C734-06(2012)

Standard Test Method for Low-Temperature Flexibility of Latex Sealants After Artificial Weathering

SIGNIFICANCE AND USE
This test evaluates the flexibility of artificially weathered latex sealants in a low-temperature environment.
SCOPE
1.1 This test method covers a laboratory procedure for the determination of low-temperature flexibility of latex sealants after 500 h artificial weathering.
1.2 The values stated in metric (SI) units are to be regarded as the standard. The values given in parentheses are 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—Currently there is no ISO standard similar to this test method.

General Information

• Status: Historical
• Publication Date: 31-May-2012
• ICS: 91.100.50 - Binders. Sealing materials
• Technical Committee: C24 - Building Seals and Sealants
• Drafting Committee: C24.40 - Weathering

Relations

• Replaces: ASTM C734-06 - Standard Test Method for Low-Temperature Flexibility of Latex Sealants After Artificial Weathering
• Effective Date: 01-Jun-2012
• Replaced By: ASTM C734-15 - Standard Test Method for Low-Temperature Flexibility of Latex Sealants After Artificial Weathering
• Effective Date: 01-Jun-2015
• Referred By: ASTM C834-17(2023) - Standard Specification for Latex Sealants
• Effective Date: 01-Jun-2012
• Referred By: ASTM C1193-16(2023) - Standard Guide for Use of Joint Sealants
• Effective Date: 01-Jun-2012
• Referred By: ASTM C1021-08(2023) - Standard Practice for Laboratories Engaged in Testing of Building Sealants
• Effective Date: 01-Jun-2012

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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:C734 −06(Reapproved 2012)
Standard Test Method for
Low-Temperature Flexibility of Latex Sealants After Artificial
Weathering
This standard is issued under the fixed designation C734; 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 6. Apparatus
1.1 This test method covers a laboratory procedure for the 6.1 T3 Temper Alclad Aluminum Panels, three, each 76 by
determination of low-temperature flexibility of latex sealants 153-mm (3 by 6-in.) of 16 to 24 gage (1.29 to 0.511 mm).
after 500 h artificial weathering.
6.2 Accelerated Weathering Device—One of the units as
1.2 The values stated in metric (SI) units are to be regarded described in Practice C1442. Because of differences in spectral
as the standard. The values given in parentheses are for power distributions of the exposure sources and exposure
information only. parameters used in the different types of devices described in
Practice C1442, test results may differ with the type of
1.3 This standard does not purport to address all of the
accelerated weathering device. Choice of type of device shall
safety concerns, if any, associated with its use. It is the
be by mutual agreement among the interested parties.
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica-
6.3 Cold Box or Freezer.
bility of regulatory limitations prior to use.
6.4 Mandrel, Wood or Metal, 25 mm (1 in.) in diameter.
NOTE 1—Currently there is no ISO standard similar to this test method.
6.5 Template, consisting of a 3.2-mm ( ⁄8-in.) thick brass
plate with a rectangular opening 38 by 127 mm (1 ⁄2 by 5 in.).
2. Referenced Documents
6.6 Spatula, metal.
2.1 ASTM Standards:
C717Terminology of Building Seals and Sealants
7. Sampling
C1442Practice for Conducting Tests on Sealants Using
Artificial Weathering Apparatus
7.1 Take the sealant to be tested directly from the container
as commercially supplied by the manufacturer.
3. Terminology
3.1 Definitions—Refer to Terminology C717 for definitions
8. Test Specimens
of the following terms used in this test method: adhesive
8.1 Prepare three test specimens as follows:
failure, latex sealant, sealant, substrate.
8.1.1 Center the template on an aluminum panel, fill it to
excess with the sealant, and strike the excess off flush with the
4. Summary of Test Method
surface of the template with the metal spatula.
4.1 A slab of the sealant is exposed, after drying, for a
8.1.2 Cut around the perimeter of the sealant, next to the
minimum of 500 h in an artificial weathering unit, after which
template, with the spatula, and carefully remove template.
it is conditioned and flexed at−17 6 1°C (0 6 2°F).
9. Conditioning
5. Significance and Use
9.1 Condition the three specimens for 2 days at standard
5.1 This test evaluates the flexibility of artificially weath-
conditions.
ered latex sealants in a low-temperature environment.
10. Procedure
ThistestmethodisunderthejurisdictionofASTMCommitteeC24onBuilding
Seals and Sealants and is the direct responsibility of Subcommittee C24.40 on
10.1 Placetheconditionedspecimensintheartificialweath-
Weathering.
ering unit and cycle them for a minimum of
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