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ASTM C1253-14

(Test Method)

Standard Test Method for Determining the Outgassing Potential of Sealant Backing

Standard Test Method for Determining the Outgassing Potential of Sealant Backing

SIGNIFICANCE AND USE
5.1 This test method is an indicator of a potential sealing problem that could occur if a sealant backing is flawed in manufacture or transportation to the job site, or abused during the installation. If flawed, some sealant backing materials, in combination with certain environmental conditions, can outgas, generating voids in the applied sealant before the sealant cures, thereby potentially compromising the cured sealant's intended performance.  
5.2 Voids are also known to be caused by other means and under certain conditions such as air entrapment during sealant application, trapped air in the substrate releasing into the uncured sealant, incompatibility of the sealant with the sealant backing or substrate, or inhospitable installation conditions in the field. This test method is limited to identifying the outgassing potential of a punctured sealant backing by formation of a void in the soft uncured sealant under conditions of heat and compression.
SCOPE
1.1 This test method provides a procedure for determining the outgassing potential of a sealant backing when it is punctured during or after installation, with the puncture occurring before the sealant cures.  
1.2 The values stated in 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.

General Information

Status
Historical
Publication Date
31-Jan-2014
ICS
91.100.50 - Binders. Sealing materials
Technical Committee
C24 - Building Seals and Sealants
Drafting Committee
C24.20 - General Test Methods
Current Stage
Ref Project

Relations

Replaces
ASTM C1253-93(2009) - Standard Test Method for Determining the Outgassing Potential of Sealant Backing
Effective Date
01-Feb-2014
Replaced By
ASTM C1253-14(2019) - Standard Test Method for Determining the Outgassing Potential of Sealant Backing
Effective Date
01-May-2019
Referred By
ASTM C1401-23 - Standard Guide for Structural Sealant Glazing
Effective Date
01-Feb-2014
Referred By
ASTM C1193-16(2023) - Standard Guide for Use of Joint Sealants
Effective Date
01-Feb-2014
Referred By
ASTM D5249-10(2021) - Standard Specification for Backer Material for Use with Cold- and Hot-Applied Joint Sealants in Portland Cement Concrete and Asphalt Joints
Effective Date
01-Feb-2014
Referred By
ASTM C1330-23 - Standard Specification for Cylindrical Sealant Backing for Use with Cold Liquid-Applied Sealants
Effective Date
01-Feb-2014

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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: C1253 − 14
Standard Test Method for
1
Determining the Outgassing Potential of Sealant Backing
This standard is issued under the fixed designation C1253; 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 temperature for 1 h and then removed. The specimen is
1
compressed12 ⁄2 %ofitsdiameterandinthecompressedstate
1.1 This test method provides a procedure for determining
returned to the oven. The specimen is removed after another
the outgassing potential of a sealant backing when it is
1
hour in the oven and compressed another 12 ⁄2 % and returned
punctured during or after installation, with the puncture occur-
to the oven, where it remains for another 2 h. The specimen is
ring before the sealant cures.
removed from the oven, and the sealant is allowed to finish
1.2 The values stated in SI units are to be regarded as the
curingatroomtemperature,whileinthecompressedcondition.
standard. The values given in parentheses are for information
The sealant is then removed from the specimen, and the back
only.
face (the face against the sealant backing) is examined. The
1.3 This standard does not purport to address all of the sealant is slit in half along its length and the size of any voids
safety concerns, if any, associated with its use. It is the
estimated.
responsibility of the user of this standard to establish appro-
5. Significance and Use
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use.
5.1 This test method is an indicator of a potential sealing
problem that could occur if a sealant backing is flawed in
2. Referenced Documents
manufacture or transportation to the job site, or abused during
2
2.1 ASTM Standards: the installation. If flawed, some sealant backing materials, in
C717 Terminology of Building Seals and Sealants combination with certain environmental conditions, can
C1193 Guide for Use of Joint Sealants outgas, generating voids in the applied sealant before the
sealant cures, thereby potentially compromising the cured
3. Terminology
sealant’s intended performance.
3.1 Definitions—Refer toTerminology C717 for the follow-
5.2 Voids are also known to be caused by other means and
ing terms used in this test method: sealant, cure, sealant
under certain conditions such as air entrapment during sealant
backing, joint, substrate, non-sag sealant, tooling, and outgas-
application, trapped air in the substrate releasing into the
sing.
uncured sealant, incompatibility of the sealant with the sealant
backing or substrate, or inhospitable installation conditions in
4. Summary of Test Method
the field. This test method is limited to identifying the
outgassing potential of a punctured sealant backing by forma-
4.1 A sample of sealant backing material is placed between
nonporoussubstratesinacompressedcondition,simulatingthe tion of a void in the soft uncured sealant under conditions of
heat and compression.
placing of sealant backing on a job site. The sealant backing is
then punctured at intervals along its exposed face. A sealant is
6. Apparatus
applied immediately after puncture, and it is tooled to make a
typical butt joint as described in Guide C1193. After tooling,
6.1 Air Circulating Oven,capableofmaintainingatempera-
the specimen is placed in an air circulating oven at elevated
ture of 122°F (50°C).
6.2 Test Frame and Stylus, as described in Annex A1.
1
ThistestmethodisunderthejurisdictionofASTMCommitteeC24onBuilding
7. Test Specimens
Seals and Sealants and is the direct responsibility of Subcommittee C24.20 on
General Test Methods.
7.1 Sealant backing should be 307.8-mm (12-in.) long and
Current edition approved Feb. 1, 2014. Published March 2014. Originally
1
of a width appropriate for use in 12.7-mm ( ⁄2-in.) wide joints.
approvedin1993.Lastpreviouseditionapprovedin2009asC1253–93(2009).DOI:
The proper width will be as specified by the sealant backing
10.1520/C1253-14.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
manufacturer.
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
1
Standards volume information, refer to the standard’s Document Summary page on NOTE 1—The test method is specifically for 12.7-mm ( ⁄2-in.) wide
the ASTM website. joints and sealant backings used in such joints. The procedure is adapted
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
C1253 − 14
easily to either wider or narrower joints if all compression is considered
9.8 If a
...

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: C1253 − 93 (Reapproved 2009) C1253 − 14
Standard Test Method for
1
Determining the Outgassing Potential of Sealant Backing
This standard is issued under the fixed designation C1253; 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 provides a procedure for determining the outgassing potential of a sealant backing when it is punctured
during or after installation, with the puncture occurring before the sealant cures.
1.2 The values stated in 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.
2. Referenced Documents
2
2.1 ASTM Standards:
C717 Terminology of Building Seals and Sealants
C1193 Guide for Use of Joint Sealants
3. Terminology
3.1 Definitions—Refer to Terminology C717 for the following terms used in this test method: sealant, cure, sealant backing,
joint, substrate, non-sag sealant, tooling, and outgassing.
4. Summary of Test Method
4.1 A sample of sealant backing material is placed between nonporous substrates in a compressed condition, simulating the
placing of sealant backing on a job site. The sealant backing is then punctured at intervals along its exposed face. A sealant is
applied immediately after puncture, and it is tooled to make a typical butt joint as described in Guide C1193. After tooling, the
1
specimen is placed in an air circulating oven at elevated temperature for 1 h and then removed. The specimen is compressed 12 ⁄2
% of its diameter and in the compressed state returned to the oven. The specimen is removed after another hour in the oven and
1
compressed another 12 ⁄2 % and returned to the oven, where it remains for another 2 h. The specimen is removed from the oven,
and the sealant is allowed to finish curing at room temperature, while in the compressed condition. The sealant is then removed
from the specimen, and the back face (the face against the sealant backing) is examined. The sealant is slit in half along its length
and the size of any voids estimated.
5. Significance and Use
5.1 This test method is an indicator of a potential sealing problem that could occur if a sealant backing is flawed in manufacture
or transportation to the job site, or abused during the installation. If flawed, some sealant backing materials, in combination with
certain environmental conditions, can outgas, generating voids in the applied sealant before the sealant cures, thereby potentially
compromising the cured sealant’s intended performance.
5.2 Voids are also known to be caused by other means and under certain conditions such as air entrapment during sealant
application, trapped air in the substrate releasing into the uncured sealant, incompatibility of the sealant with the sealant backing
or substrate, or inhospitable installation conditions in the field. This test method is limited to identifying the outgassing potential
of a punctured sealant backing by formation of a void in the soft uncured sealant under conditions of heat and compression.
1
This test method is under the jurisdiction of ASTM Committee C24 on Building Seals and Sealants and is the direct responsibility of Subcommittee C24.20 on General
Test Methods.
Current edition approved June 1, 2009Feb. 1, 2014. Published June 2009March 2014. Originally approved in 1993. Last previous edition approved in 20052009 as
C1253–93(2005).C1253–93(2009). DOI: 10.1520/C1253-93R09.10.1520/C1253-14.
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 ----------------------
C1253 − 14
6. Apparatus
6.1 Air Circulating Oven, capable of maintaining a temperature of 122°F (50°C).
6.2 Test Frame and Stylus, as described in Annex A1.
7. Test Specimens
1
7.1 Sealant b
...

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

SIGNIFICANCE AND USE
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.
SCOPE
1.1 This test method covers a laboratory procedure for determining the effects of accelerated weathering on cured-in-place elastomeric joint sealants (single- and multicomponent) for use in building construction.  
1.2 The values stated in SI units are to be regarded as the standard. The values in parentheses are for information only.  
1.3 The committee with jurisdiction over this standard is not aware of any comparable standards published by other ASTM committees or other organizations.  
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.

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  • Standard
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ASTM
ASTM C765-23(Test Method)
Standard Test Method for Low-Temperature Flexibility 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 is not intended to simulate an actual use condition, but it will give some indication of the flexibility and adhesion of a tape at low temperature. It can serve to differentiate between flexible tapes that can take some movement and those that tend to harden or embrittle on aging and crack or lose adhesion when flexed at low temperature. It will also aid in identifying sealants that have poor flexibility because they are overextended and contain a low level of binder as well as those sealants having binders that will embrittle at low temperature.
SCOPE
1.1 This test method covers a laboratory procedure for testing the low-temperature flexibility of preformed tape sealants.  
1.2 The values stated in SI units are to be regarded as the standard. The values 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.4 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.

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    2 pages
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  • Standard
    2 pages
    English language
    sale 15% off