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ASTM C732-06

(Test Method)

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

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

SIGNIFICANCE AND USE
Accelerated weathering exposure serves to indicate long-term exterior durability of the sealant. In this test method, durability is tested when the sealant is used with wood or aluminum.
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.
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-Aug-2006
ICS
91.100.50 - Binders. Sealing materials
Technical Committee
C24 - Building Seals and Sealants
Drafting Committee
C24.40 - Weathering
Current Stage
Ref Project

Relations

Replaces
ASTM C732-01 - Standard Test Method for Aging Effects of Artificial Weathering on Latex Sealants
Effective Date
01-Sep-2006
Replaced By
ASTM C732-06(2012) - Standard Test Method for Aging Effects of Artificial Weathering on Latex Sealants
Effective Date
01-Jun-2012
Referred By
ASTM C1193-16(2023) - Standard Guide for Use of Joint Sealants
Effective Date
01-Sep-2006
Referred By
ASTM C1021-08(2023) - Standard Practice for Laboratories Engaged in Testing of Building Sealants
Effective Date
01-Sep-2006
Referred By
ASTM C834-17(2023) - Standard Specification for Latex Sealants
Effective Date
01-Sep-2006
Referred By
ASTM E2813-18 - Standard Practice for Building Enclosure Commissioning
Effective Date
01-Sep-2006

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ASTM C732-06 - Standard Test Method for Aging Effects of Artificial Weathering on Latex SealantsASTM C732-06 - Standard Test Method for Aging Effects of Artificial Weathering on Latex Sealants
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ASTM C732-06 - Standard Test Method for Aging Effects of Artificial Weathering on Latex Sealants
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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: C732 – 06
Standard Test Method for
1
Aging Effects of Artificial Weathering on Latex Sealants
This standard is issued under the fixed designation C732; 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.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope exposedforintervalsof500htospecifiedalternatewetanddry
cycles in an accelerated weathering unit, then periodically
1.1 This test method covers a laboratory procedure for the
examined for evidences of deterioration.
determination of aging effects of artificial weathering on latex
sealants.
5. Significance and Use
1.2 The values stated in metric (SI) units are to be regarded
5.1 Accelerated weathering exposure serves to indicate
as the standard. The values given in parentheses are for
long-term exterior durability of the sealant. In this test method,
information only.
durability is tested when the sealant is used with wood or
1.3 This standard does not purport to address all of the
aluminum.
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 and health practices and determine the applica-
6.1 Accelerated Weathering Device—One of the units as
bility of regulatory limitations prior to use.
described in Practice C1442. Because of differences in spectral
NOTE 1—Currently there is no ISO standard similar to this test method.
power distributions of the exposure sources and exposure
parameters used in the different types of devices described in
2. Referenced Documents
Practice C1442, test results may differ with the type of
2
2.1 ASTM Standards:
accelerated weathering device. Choice of type of device shall
C717 Terminology of Building Seals and Sealants
be by mutual agreement among the interested parties.
C1442 Practice for Conducting Tests on Sealants Using
6.2 Channel Panel attached to a Sample Holder as shown
Artificial Weathering Apparatus
in Fig. 1.
6.3 Knife, for tooling.
3. Terminology
3.1 Definitions:
7. Sampling
3.1.1 Definitions of the following terms are found in Ter-
7.1 Use the sealant to be tested directly from the container
minology C717: adhesive failure (loss of adhesion); latex
as commercially supplied by the manufacturer.
sealant; sealant.
8. Test Specimens
4. Summary of Test Method
3
8.1 Prepare two 25 by 70 by 175-mm (1 by 2 ⁄4 by 7-in.)
4.1 The sealant is placed in a specially constructed wood-
wood-and-aluminum channel panels as shown in Fig. 1, using
and-aluminum fixture (referred to as a “channel panel”) and
the following materials:
8.1.1 Exterior Fir Plywood,withawater-resistantthermoset
1
glue such as urea or melamine-formaldehyde type.
ThistestmethodisunderthejurisdictionofASTMCommitteeC24onBuilding
Seals and Sealants and is the direct responsibility of Subcommittee C24.40 on 8.1.2 Ponderosa Pine Sapwood, white kiln dried and free of
Weathering.
knots or imperfections.
Current edition approved Sept. 1, 2006. Published September 2006. Originally
8.1.3 Aluminum Alloy 6063-T5 or 6061-T6, clear, anodized
approved in 1972. Last previous edition approved in 2001 as C732 – 01. DOI:
a minimum of 30 min over a scale-free finish.
10.1520/C0732-06.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
8.1.4 Polyethylene Spacer of low-density film approxi-
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
mately 5 mils (0.13 mm) thick.
Standards volume information, refer to the standard’s Document Summary page on
8.1.5 Screws and Nails, zinc-coated or nonrusting type.
the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1

---------------------- Page: 1 ----------------------
C732 – 06
Metric Equivalents Materials:
3 3
in. mm in. mm 1— ⁄8 by 2 ⁄4 by 7-in. plywood
1 3 1 3
⁄4 6.4 ⁄4 19.1 1— ⁄4 by ⁄4 by 7-in. aluminum
3 3 1 1
⁄8 9.5 2 ⁄4 69.9 2— ⁄4 by ⁄2 by 7-in. ponderosa white pine
1 3
⁄2 12.7 7 177.8 1—2 ⁄4 by 7-in. sheet untreated polyethylene
3 Screws
6 Nails
1 Aluminum Panel
FIG. 1 Channel Panel attached to a Sample Holder
8.2 Using a gun or knife, completely fill the two 7 by with the start of the light cycle. Refer to Practice C1442 for the
1 1
13-mm ( ⁄4 by ⁄2-in.) channels in both panels with sealant,
artificial weathering unit operating conditions. Expose speci-
striking off the excess from the top and ends so that it is flush
mens in the xenon arc device for a minimum of 500 h at an
2
with the panel surfaces.
irradiance level of 0.51 W/(m · nm) at 340 nm. The radiant
2
ex
...

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Standard Test Method for Effects of Laboratory Accelerated Weathering on Elastomeric Joint Sealants

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5.1 It is known that solar radiation contributes to the degradation of sealants in exterior building joints. The use of a laboratory accelerated weathering machine with actinic radiation, moisture and heat appears to be a feasible means to give indications of early degradation by the appearance of sealant cracking. However, simulated weather factors in combination with extension may produce more severe degradation than weather factors only. Therefore, the effect of the weathering test is made more sensitive by the addition of the bending of the specimen at cold temperature.
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1.2 The values stated in SI units are to be regarded as the standard. The values in parentheses are for information only.  
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1.4 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.  
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