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ASTM C734-15

(Test Method)

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

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

SIGNIFICANCE AND USE
5.1 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-2015
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 C734-06(2012) - Standard Test Method for Low-Temperature Flexibility of Latex Sealants After Artificial Weathering
Effective Date
01-Jun-2015
Replaced By
ASTM C734-15(2019) - Standard Test Method for Low-Temperature Flexibility of Latex Sealants After Artificial Weathering
Effective Date
01-Oct-2019
Referred By
ASTM C1193-16(2023) - Standard Guide for Use of Joint Sealants
Effective Date
01-Jun-2015
Referred By
ASTM C1021-08(2023) - Standard Practice for Laboratories Engaged in Testing of Building Sealants
Effective Date
01-Jun-2015
Referred By
ASTM C834-17(2023) - Standard Specification for Latex Sealants
Effective Date
01-Jun-2015

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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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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:C734 −15
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. 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 5. Significance and Use
1.1 This test method covers a laboratory procedure for the 5.1 This test evaluates the flexibility of artificially weath-
determination of low-temperature flexibility of latex sealants ered latex sealants in a low-temperature environment.
after 500 h artificial weathering.
6. Apparatus
1.2 The values stated in metric (SI) units are to be regarded
6.1 T3 Temper Alclad Aluminum Panels, three, each 76 by
as the standard. The values given in parentheses are for
153-mm (3 by 6-in.) of 16 to 24 gage (1.29 to 0.511 mm).
information only.
6.2 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.
6.3 Cold Box or Freezer.
2. Referenced Documents
2
6.4 Mandrel, Wood or Metal, 25 mm (1 in.) in diameter.
2.1 ASTM Standards:
C717Terminology of Building Seals and Sealants 1
6.5 Template, consisting of a 3.2-mm ( ⁄8-in.) thick brass
1
C1442Practice for Conducting Tests on Sealants Using
plate with a rectangular opening 38 by 127 mm (1 ⁄2 by 5 in.).
Artificial Weathering Apparatus
6.6 Spatula, metal.
3. Terminology
7. Sampling
3.1 Definitions—Refer to Terminology C717 for definitions
7.1 Take the sealant to be tested directly from the container
of the following terms used in this test method: adhesive
as commercially supplied by the manufacturer.
failure, latex sealant, sealant, substrate, and standard condi-
tions.
8. Test Specimens
8.1 Prepare three test specimens as follows:
4. Summary of Test Method
8.1.1 Center the template on an aluminum panel, fill it to
4.1 A slab of the sealant is exposed, after drying, for a
excess with the sealant, and strike the excess off flush with the
minimum of 500 h in an artificial weathering unit, after which
surface of the template with the metal spatula.
it is conditioned and flexed at−17 6 1°C (0 6 2°F).
8.1.2 Cut around the perimeter of the sealant, next to the
template, with the spatula, and carefully remove template.
9. Conditioning
1
ThistestmethodisunderthejurisdictionofASTMCommitteeC24onBuilding
Seals and Sealants and is the direct responsibility of Subcommittee C24.40 on
9.1 Condition the three specimens for 2 days at standard
Weathering.
conditions.
CurrenteditionapprovedJune1,2015.PublishedJuly2015.Originallyapproved
in 1972. Last previous edition approved in 2012 as C732–06(2012).
...

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: C734 − 06 (Reapproved 2012) C734 − 15
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. 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
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.
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—Refer to Terminology C717 for definitions of the following terms used in this test method: adhesive failure,
latex sealant, sealant, substrate. substrate, and standard conditions.
4. Summary of Test Method
4.1 A slab of the sealant is exposed, after drying, for a minimum of 500 h in an artificial weathering unit, after which it is
conditioned and flexed at − 17 6 1°C (0 6 2°F).
5. Significance and Use
5.1 This test evaluates the flexibility of artificially weathered latex sealants in a low-temperature environment.
6. Apparatus
6.1 T3 Temper Alclad Aluminum Panels, three, each 76 by 153-mm (3 by 6-in.) of 16 to 24 gage (1.29 to 0.511 mm).
6.2 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.
6.3 Cold Box or Freezer.
6.4 Mandrel, Wood or Metal, 25 mm (1 in.) in diameter.
1
This test method is under the jurisdiction of ASTM Committee C24 on Building Seals and Sealants and is the direct responsibility of Subcommittee C24.40 on
Weathering.
Current edition approved June 1, 2012June 1, 2015. Published June 2012 July 2015. Originally approved in 1972. Last previous edition approved in 20062012 as
C732 – 06.C732 – 06(2012). DOI: 10.1520/C0734-06R12.10.1520/C0734-15.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. 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 ----------------------
C734 − 15
1 1
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.).
6.6 Spatula, metal.
7. Sampling
7.1 Take the sealant to be tested directly from the container as commercially supplied by the manufacturer.
8. Test Specimens
8.1 Prepare three test specimens as follows:
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 surface
of the template with the metal spatula.
8.1.2 Cut around the perimeter of the sealant, next to the template, with the spatula, and carefully remove template.
9. Conditioning
9.1 Condition the three specimens for 2 days at standard conditions.
10. Procedure
10.1 Place the conditioned specimens in the artificial weathering unit and cycle them for a minimum of 500 h, beginning with
the start of the light cycle. Refer to Practice C1442 for the artificial weathering unit operating conditions. Expose specimens in
2
the xenon arc device for a minimum of 500 h at an irradiance level of 0.51 W(m · nm) at 340 nm. The radiant exposure for this
2
is 918 kJ/(m · nm) at 340 nm. To determine the exposure time required to obtain the same radiant exposure at other irradi
...

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ASTM
ASTM C782-13(2023)(Test Method)
Standard Test Method for Softness of Preformed Tape Sealants

SIGNIFICANCE AND USE
5.1 Preformed tape sealants are tacky, deformable solids that are used under compression between two substrates in a variety of sealing applications. This procedure measures the softness of a preformed tape sealant and gives an indication of the preformed tape sealant's ease of compression during installation. The resistance to penetration may also give an indication of the toughness of the preformed tape sealant.
SCOPE
1.1 This test method describes a laboratory procedure for determining the softness of preformed tape sealants.  
Note 1: Cone penetration methods applicable to greases and to petrolatum are described in Test Methods D217 and D937. Test Method D2451 also uses a penetration technique for determining the degree of set in sash glazing compounds.  
1.2 The values stated in SI units are to be regarded as standard. Temperature values are also provided (in parentheses) in degrees Fahrenheit.  
1.3 The subcommittee with jurisdiction is not aware of any similar ISO standard.  
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.  
1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

  • Standard
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