ASTM C732-17

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

SIGNIFICANCE AND USE
5.1 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.  
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-Dec-2016
• ICS: 91.100.50 - Binders. Sealing materials
• Technical Committee: C24 - Building Seals and Sealants
• Drafting Committee: C24.40 - Weathering

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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 −17
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 U.S. Department of Defense.
1. Scope 5. Significance and Use
1.1 This test method covers a laboratory procedure for the 5.1 Accelerated weathering exposure serves to indicate
determination of aging effects of artificial weathering on latex long-term exterior durability of the sealant. In this test method,
sealants. durability is tested when the sealant is used with wood or
aluminum.
1.2 The values stated in metric (SI) units are to be regarded
as the standard. The values given in parentheses are for
6. Apparatus
information only.
6.1 Accelerated Weathering Device—One of the units as
1.3 This standard does not purport to address all of the
described in Practice C1442. Because of differences in spectral
safety concerns, if any, associated with its use. It is the
power distributions of the exposure sources and exposure
responsibility of the user of this standard to establish appro-
parameters used in the different types of devices described in
priate safety and health practices and determine the applica-
Practice C1442, test results may differ with the type of
bility of regulatory limitations prior to use.
accelerated weathering device. Choice of type of device shall
NOTE 1—Currently there is no ISO standard similar to this test method.
be by mutual agreement among the interested parties.
2. Referenced Documents 6.2 Channel Panel attached to a Sample Holder as shown in
Fig. 1.
2
2.1 ASTM Standards:
C717 Terminology of Building Seals and Sealants 6.3 Knife, for tooling.
C1442 Practice for Conducting Tests on Sealants Using
7. Sampling
Artificial Weathering Apparatus
7.1 Use the sealant to be tested directly from the container
3. Terminology
as commercially supplied by the manufacturer.
3.1 Definitions:
3.1.1 Definitions of the following terms are found in Ter-
8. Test Specimens
minology C717: adhesive failure (loss of adhesion); latex
3
8.1 Prepare two 25 by 70 by 175-mm (1 by 2 ⁄4 by 7-in.)
sealant; sealant, standard conditions.
wood-and-aluminum channel panels as shown in Fig. 1, using
the following materials:
4. Summary of Test Method
8.1.1 Exterior Fir Plywood,withawater-resistantthermoset
4.1 The sealant is placed in a specially constructed wood-
glue such as urea or melamine-formaldehyde type.
and-aluminum fixture (referred to as a “channel panel”) and
8.1.2 Ponderosa Pine Sapwood, white kiln dried and free of
exposedforintervalsof500htospecifiedalternatewetanddry
knots or imperfections.
cycles in an accelerated weathering unit, then periodically
8.1.3 Aluminum Alloy 6063-T5 or 6061-T6, clear, anodized
examined for evidences of deterioration.
a minimum of 30 min over a scale-free finish.
8.1.4 Polyethylene Bond-Breaker of low-density film ap-
1
ThistestmethodisunderthejurisdictionofASTMCommitteeC24onBuilding proximately 5 mils (0.13 mm) thick.
Seals and Sealantsand is the direct responsibility of Subcommittee C24.40 on
8.1.5 Screws and Nails, zinc-coated or nonrusting type.
Weathering.
Current edition approved Jan. 1, 2017. Published February 2017. Originally 8.2 Using a gun or knife, completely fill the two 7 by
approvedin1972.Lastpreviouseditionapprovedin2012asC732 – 06(2012).DOI: 1 1
13-mm ( ⁄4 by ⁄2-in.) channels in both panels with sealant,
10.1520/C0732-17.
striking off the excess from the top and ends so that it is flush
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
with the panel surfaces.
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on NOTE 2—The length dimension of the channel may be reduced as
the ASTM website. needed to accommodate the specimen holder requirements of the artificial
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
C732−17
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
weathering device available for use.
the exposure time required to obtain the same radiant exposure
...

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: C732 − 06 (Reapproved 2012) C732 − 17
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 U.S. Department of Defense.
1. 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.
1.3 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.
2. Referenced Documents
2
2.1 ASTM Standards:
C717 Terminology of Building Seals and Sealants
C1442 Practice for Conducting Tests on Sealants Using Artificial Weathering Apparatus
3. Terminology
3.1 Definitions:
3.1.1 Definitions of the following terms are found in Terminology C717: adhesive failure (loss of adhesion); latex sealant;
sealant.sealant, standard conditions.
4. Summary of Test Method
4.1 The sealant is placed in a specially constructed wood-and-aluminum fixture (referred to as a “channel panel”) and exposed
for intervals of 500 h to specified alternate wet and dry cycles in an accelerated weathering unit, then periodically examined for
evidences of deterioration.
5. Significance and Use
5.1 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.
6. Apparatus
6.1 Accelerated Weathering Device—One of the units as described in Practice C1442. Because of differences in spectral power
distributions of the exposure sources and exposure parameters used in the different types of devices described in Practice C1442,
test results may differ with the type of accelerated weathering device. Choice of type of device shall be by mutual agreement among
the interested parties.
6.2 Channel Panel attached to a Sample Holder as shown in Fig. 1.
6.3 Knife, for tooling.
1
This test method is under the jurisdiction of ASTM Committee C24 on Building Seals and Sealantsand is the direct responsibility of Subcommittee C24.40 on Weathering.
Current edition approved June 1, 2012Jan. 1, 2017. Published June 2012February 2017. Originally approved in 1972. Last previous edition approved in 20062012 as
C732 – 06.C732 – 06(2012). DOI: 10.1520/C0732-06R12.10.1520/C0732-17.
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.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
C732 − 17
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
7. Sampling
7.1 Use the sealant to be tested directly from the container as commercially supplied by the manufacturer.
8. Test Specimens
3
8.1 Prepare two 25 by 70 by 175-mm (1 by 2 ⁄4 by 7-in.) wood-and-aluminum channel panels as shown in Fig. 1, using the
following materials:
8.1.1 Exterior Fir Plywood, with a water-resistant thermoset glue such as urea or melamine-formaldehyde type.
8.1.2 Ponderosa Pine Sapwood, white kiln dried and free of knots or imperfections.
8.1.3 Aluminum Alloy 6063-T5 or 6061-T6, clear, anodized a minimum of 30 min over a scale-free finish.
8.1.4 Polyethylene SpacerBond-Breaker of low-density film approximately 5 mils (0.13 mm) thick.
8.1.5 Screws and Nails, zinc-coated or nonrusting type.
1 1
8.2 Using a gun or knife, co
...