ASTM C732-95

Standard Test Method for Aging Effects of Artificial Weathering on Latex Sealants

SCOPE
1.1 This test method covers a laboratory procedure for the determination of aging effects of artificial weathering on latex sealants.
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.
1.3This 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.

General Information

• Status: Historical
• Publication Date: 09-Jun-2001
• ICS: 91.100.50 - Binders. Sealing materials
• Technical Committee: C24 - Building Seals and Sealants
• Drafting Committee: C24.20 - General Test Methods

Relations

• Replaced By: ASTM C732-01 - Standard Test Method for Aging Effects of Artificial Weathering on Latex Sealants
• Effective Date: 10-Jun-2001
• Referred By: ASTM C1021-08(2023) - Standard Practice for Laboratories Engaged in Testing of Building Sealants
• Effective Date: 10-Jun-2001
• Referred By: ASTM E2813-18 - Standard Practice for Building Enclosure Commissioning
• Effective Date: 10-Jun-2001
• Referred By: ASTM C1193-16(2023) - Standard Guide for Use of Joint Sealants
• Effective Date: 10-Jun-2001
• Referred By: ASTM C834-17(2023) - Standard Specification for Latex Sealants
• Effective Date: 10-Jun-2001

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
Designation: C 732 – 95
Standard Test Method for
Aging Effects of Artificial Weathering on Latex Sealants
This standard is issued under the fixed designation C 732; 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 (e) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense.
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Note—ASTM Subcommittee C 24.16 is actively studying additional weathering units, exposure conditions, and procedures for the
purpose of improving this test method.
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1. Scope then examined for evidences of deterioration.
1.1 This test method covers a laboratory procedure for the
5. Significance and Use
determination of aging effects of artificial weathering on latex
5.1 Accelerated weathering exposure serves to indicate
sealants.
long-term exterior durability of the sealant. In this test method,
1.2 The values stated in metric (SI) units are to be regarded
durability is tested when the sealant is used with wood or
as the standard. The values given in parentheses are for
aluminum.
information only.
1.3 This standard does not purport to address all of the
6. Apparatus
safety concerns, if any, associated with its use. It is the
6.1 Accelerated Weathering Unit—One of the units either of
responsibility of the user of this standard to establish appro-
the Type D through F as described in Practice G 23 or Type A
priate safety and health practices and determine the applica-
through BH as described in Practice G 26, plus a 102-18
bility of regulatory limitations prior to use.
cycling cam and black panel accessories.
6.2 Q-Panel Sample Holder as shown in Fig. 1.
2. Referenced Documents
6.3 Knife, for tooling.
2.1 ASTM Standards:
C 717 Terminology of Building Seals and Sealants
7. Sampling
G 23 Practice for Operating Light-Exposure Apparatus
7.1 Use the sealant to be tested directly from the container
(Carbon-Arc Type) With and Without Water for Exposure
as commercially supplied by the manufacturer.
of Nonmetallic Materials
G 26 Practice for Operating Light-Exposure Apparatus
8. Test Specimens
(Xenon-Arc Type) With and Without Water for Exposure
8.1 Prepare two 25 by 70 by 175-mm (1 by 2 ⁄4 by 7-in.)
of Nonmetallic Materials
wood-and-metal panels as shown in Fig. 1, using the following
materials:
3. Terminology
8.1.1 Exterior Fir Plywood, with a water-resistant thermoset
3.1 Definitions:
glue such as urea or melamine-formaldehyde type.
3.1.1 Definitions of the following terms are found in Ter-
8.1.2 Ponderosa Pine Sapwood, white kiln dried and free of
minology C 717: adhesive failure (loss of adhesion); latex
knots or imperfections.
sealant; sealant.
8.1.3 Aluminum Alloy 6063-T5 or 6061-T6, clear, anodized
4. Summary of Test Method a minimum of 30 min over a scale-free finish.
8.1.4 Polyethylene Spacer of low-density film approxi-
4.1 The sealant is placed in a specially constructed
mately 5 mils (0.13 mm) thick.
woodand-metal fixture and exposed for 500 h to specified
8.1.5 Screws and Nails, zinc-coated or nonrusting type.
alternate wet and dry cycles in an accelerated weathering unit,
8.2 Using a gun or knife, completely fill th
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