ASTM C734-01

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation: C 734 – 01
Standard Test Method for
Low-Temperature Flexibility of Latex Sealants After Artificial
1
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.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope 4. Summary of Test Method
1.1 This test method covers a laboratory procedure for the 4.1 Aslab of the sealant is exposed, after drying, for 500 h
determination of low-temperature flexibility of latex sealants inanartificialweatheringunit,afterwhichitisconditionedand
after 500 h artificial weathering. flexed at−17 6 1°C (0 6 2°F).
1.2 The values stated in metric (SI) units are to be regarded
5. Significance and Use
as the standard. The values given in parentheses are for
5.1 This test evaluates the flexibility of artificially weath-
information only.
1.3 This standard does not purport to address all of the ered latex sealants in a low-temperature environment.
safety concerns, if any, associated with its use. It is the
6. Apparatus
responsibility of the user of this standard to establish appro-
6.1 T3 Temper Alclad Aluminum Panels, three, each 76 by
priate safety and health practices and determine the applica-
153-mm (3 by 6-in.) of 16 to 24 gage (1.29 to 0.511 mm),
bility of regulatory limitations prior to use.
conforming with CSA Specification HA-4 CC42.
NOTE 1—CurrentlythereisnoISOstandardsimilartothistestmethod.
6.2 Accelerated Weathering Unit—Oneoftheunitseitherof
the Type D through F as described in Practice G23 or TypeA
2. Referenced Documents
through BH as described in Practice G26, plus a 102-18
2.1 ASTM Standards:
cycling cam and black panel accessories.
2
C717 Terminology Building Seals and Sealants
6.3 Cold Box or Freezer.
G 23 Practice for Operating Light-Exposure Apparatus
6.4 Mandrel, Wood or Metal, 25 mm (1 in.) in diameter.
(Carbon-Arc Type) With and Without Water for Exposure
1
6.5 Template, consisting of a 3.2-mm ( ⁄8-in.) thick brass
3
of Nonmetallic Materials
1
plate with a rectangular opening 38 by 127 mm (1 ⁄2 by 5 in.).
G 26 Practice for Operating Light-Exposure Apparatus
6.6 Spatula, metal.
(Xenon-Arc Type) With and Without Water for Exposure
3
of Nonmetallic Materials
7. Sampling
2.2 Other Standards:
7.1 Take the sealant to be tested directly from the container
4
CSA Specification HA-4 CC42
as commercially supplied by the manufacturer.
3. Terminology
8. Test Specimens
3.1 Definitions—RefertoTerminologyC717fordefinitions
8.1 Prepare three test specimens as follows:
of the following terms used in this test method: adhesive
8.1.1 Center the template on an aluminum panel, fill it to
failure, latex sealant, sealant, substrate.
excess with the sealant, and strike the excess off flush with the
surface of the template with the metal spatula.
1
8.1.2 Cut around the perimeter of the sealant, next to the
ThistestmethodisunderthejurisdictionofASTMCommitteeC
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