ASTM C1330-23
(Specification)Standard Specification for Cylindrical Sealant Backing for Use with Cold Liquid-Applied Sealants
Standard Specification for Cylindrical Sealant Backing for Use with Cold Liquid-Applied Sealants
ABSTRACT
This standard specification covers the basic requirements for cylindrical sealant backing for use with cold liquid-applied sealants. Cylindrical sealant backings are classified into three types: type C, type O, and type B, composed predominantly of closed cell material, open cell material, and bi-cellular material, respectively. Test methods for cylindrical sealant backing include water absorption, density, outgassing, compression deflection and recovery, and tensile strength. The sealant shall be clean, free of scale, foreign matter, oil, or water.
SIGNIFICANCE AND USE
5.1 This specification is designed to give some indication as to the differences in performance for various cylindrical sealant backings.
5.2 Although this specification qualifies a cylindrical sealant backing for use, it does not address the compatibility of the backing with the sealants with which it will make contact. Sealant compatibility should be confirmed by the sealant manufacturer. Compatibility characteristics of sealants in contact with cylindrical sealant backings can be determined by Test Method C1087.
SCOPE
1.1 This specification covers the basic requirements for cylindrical sealant backing to be used with cold liquid applied sealants for use in building seals.
1.2 Cylindrical sealant backing serves one or more of the following functions:
1.2.1 Limits the amount and depth of sealant applied into a joint,
1.2.2 Acts as a bond breaker to allow joint movement without undue stress to the sealant,
1.2.3 Provides a form to assist the sealant in developing the proper shape factor, and
1.2.4 Acts as a barrier to the flow of sealant through the joint.
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.
General Information
- Status
- Published
- Publication Date
- 30-Apr-2023
- Technical Committee
- C24 - Building Seals and Sealants
- Drafting Committee
- C24.10 - Specifications, Guides and Practices
Relations
- Effective Date
- 15-Jul-2020
- Effective Date
- 01-May-2019
- Effective Date
- 01-Mar-2019
- Effective Date
- 01-Mar-2018
- Effective Date
- 01-Nov-2017
- Effective Date
- 01-Jan-2017
- Effective Date
- 15-Nov-2016
- Effective Date
- 01-Sep-2016
- Effective Date
- 01-May-2014
- Refers
ASTM C1253-14 - Standard Test Method for Determining the Outgassing Potential of Sealant Backing - Effective Date
- 01-Feb-2014
- Effective Date
- 01-Feb-2014
- Effective Date
- 01-Nov-2013
- Effective Date
- 01-Dec-2012
- Effective Date
- 01-May-2012
- Effective Date
- 15-Jan-2012
Overview
ASTM C1330-23: Standard Specification for Cylindrical Sealant Backing for Use with Cold Liquid-Applied Sealants outlines the essential requirements for cylindrical sealant backing materials used in combination with cold-applied sealants, particularly for sealing applications in buildings. This standard, published by ASTM International, provides clear guidance for the performance and classification of sealant backing types, ensuring reliable and consistent results in construction and sealing applications.
Key Topics
Cylindrical Sealant Backing Types
ASTM C1330-23 classifies cylindrical sealant backings into three main types:- Type C: Predominantly closed cell material
- Type O: Predominantly open cell material
- Type B: Bi-cellular material
Performance and Physical Requirements
The standard specifies the following critical properties and associated test methods:- Water Absorption (ASTM C1016)
- Density (ASTM D1622)
- Outgassing (ASTM C1253)
- Compression Deflection and Recovery (ASTM D5249)
- Tensile Strength (ASTM D1623)
Functions of Sealant Backing
Cylindrical sealant backing materials serve to:- Limit the amount and depth of sealant applied in a joint
- Act as a bond breaker to accommodate joint movement
- Provide form to help sealant achieve the correct shape factor
- Serve as a barrier to prevent sealant flow through joints
Cleanliness and Packaging
Materials must be clean and free from contaminants that could interfere with sealant curing or adhesion. Packaging requirements include manufacturer information, product type and size, and ASTM classification.
Applications
Building and Construction Joints
Cylindrical sealant backing materials are essential in building construction to ensure effective sealing of expansion joints, window perimeters, facade elements, and other structural joins.Sealant Optimization
By controlling the depth and profile of applied sealant, backer rods help optimize performance, durability, and material usage in cold liquid-applied sealant systems.Movement Accommodation
Acting as a bond breaker, cylindrical backer rods help relieve stress on the sealant during joint movement, thus enhancing the longevity of joints in dynamic environments.Prevention of Three-Sided Adhesion
Proper use of backing materials as specified in ASTM C1330-23 prevents unwanted adhesion, ensuring only designated surfaces are bonded for optimal function.
Related Standards
For comprehensive use and assessment of cylindrical sealant backing materials, refer to the following relevant ASTM standards:
- ASTM C717: Terminology of Building Seals and Sealants
- ASTM C1016: Test Method for Determination of Water Absorption of Sealant Backing
- ASTM C1087: Test Method for Determining Compatibility of Liquid-Applied Sealants with Accessories Used in Structural Glazing Systems
- ASTM C1253: Test Method for Determining the Outgassing Potential of Sealant Backing
- ASTM D1622: Test Method for Apparent Density of Rigid Cellular Plastics
- ASTM D1623: Test Method for Tensile and Tensile Adhesion Properties of Rigid Cellular Plastics
- ASTM D5249: Specification for Backer Material for Use with Cold- and Hot-Applied Joint Sealants in Portland Cement Concrete and Asphalt Joints
Summary
ASTM C1330-23 provides a detailed framework for specifying, testing, and applying cylindrical sealant backing (backer rod) materials within cold-applied sealant systems. By adhering to this standard, builders, architects, and manufacturers can ensure reliable joint performance, longevity, and compliance with international construction best practices. For robust, lasting sealant joints in building projects, reference and implement ASTM C1330-23 and its related standards.
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Frequently Asked Questions
ASTM C1330-23 is a technical specification published by ASTM International. Its full title is "Standard Specification for Cylindrical Sealant Backing for Use with Cold Liquid-Applied Sealants". This standard covers: ABSTRACT This standard specification covers the basic requirements for cylindrical sealant backing for use with cold liquid-applied sealants. Cylindrical sealant backings are classified into three types: type C, type O, and type B, composed predominantly of closed cell material, open cell material, and bi-cellular material, respectively. Test methods for cylindrical sealant backing include water absorption, density, outgassing, compression deflection and recovery, and tensile strength. The sealant shall be clean, free of scale, foreign matter, oil, or water. SIGNIFICANCE AND USE 5.1 This specification is designed to give some indication as to the differences in performance for various cylindrical sealant backings. 5.2 Although this specification qualifies a cylindrical sealant backing for use, it does not address the compatibility of the backing with the sealants with which it will make contact. Sealant compatibility should be confirmed by the sealant manufacturer. Compatibility characteristics of sealants in contact with cylindrical sealant backings can be determined by Test Method C1087. SCOPE 1.1 This specification covers the basic requirements for cylindrical sealant backing to be used with cold liquid applied sealants for use in building seals. 1.2 Cylindrical sealant backing serves one or more of the following functions: 1.2.1 Limits the amount and depth of sealant applied into a joint, 1.2.2 Acts as a bond breaker to allow joint movement without undue stress to the sealant, 1.2.3 Provides a form to assist the sealant in developing the proper shape factor, and 1.2.4 Acts as a barrier to the flow of sealant through the joint. 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.
ABSTRACT This standard specification covers the basic requirements for cylindrical sealant backing for use with cold liquid-applied sealants. Cylindrical sealant backings are classified into three types: type C, type O, and type B, composed predominantly of closed cell material, open cell material, and bi-cellular material, respectively. Test methods for cylindrical sealant backing include water absorption, density, outgassing, compression deflection and recovery, and tensile strength. The sealant shall be clean, free of scale, foreign matter, oil, or water. SIGNIFICANCE AND USE 5.1 This specification is designed to give some indication as to the differences in performance for various cylindrical sealant backings. 5.2 Although this specification qualifies a cylindrical sealant backing for use, it does not address the compatibility of the backing with the sealants with which it will make contact. Sealant compatibility should be confirmed by the sealant manufacturer. Compatibility characteristics of sealants in contact with cylindrical sealant backings can be determined by Test Method C1087. SCOPE 1.1 This specification covers the basic requirements for cylindrical sealant backing to be used with cold liquid applied sealants for use in building seals. 1.2 Cylindrical sealant backing serves one or more of the following functions: 1.2.1 Limits the amount and depth of sealant applied into a joint, 1.2.2 Acts as a bond breaker to allow joint movement without undue stress to the sealant, 1.2.3 Provides a form to assist the sealant in developing the proper shape factor, and 1.2.4 Acts as a barrier to the flow of sealant through the joint. 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.
ASTM C1330-23 is classified under the following ICS (International Classification for Standards) categories: 91.100.50 - Binders. Sealing materials. The ICS classification helps identify the subject area and facilitates finding related standards.
ASTM C1330-23 has the following relationships with other standards: It is inter standard links to ASTM D1622-20, ASTM C1253-14(2019), ASTM C717-19, ASTM C717-18, ASTM C717-17a, ASTM C717-17, ASTM C717-16a, ASTM C717-16, ASTM C717-14a, ASTM C1253-14, ASTM C717-14, ASTM C717-13, ASTM C717-12b, ASTM C717-12a, ASTM C717-12. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
ASTM C1330-23 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
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.
Designation: C1330 − 23
Standard Specification for
Cylindrical Sealant Backing for Use with Cold Liquid-
Applied Sealants
This standard is issued under the fixed designation C1330; 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 C1016 Test Method for Determination of Water Absorption
of Sealant Backing (Joint Filler) Material
1.1 This specification covers the basic requirements for
C1087 Test Method for Determining Compatibility of
cylindrical sealant backing to be used with cold liquid applied
Liquid-Applied Sealants with Accessories Used in Struc-
sealants for use in building seals.
tural Glazing Systems
1.2 Cylindrical sealant backing serves one or more of the
C1253 Test Method for Determining the Outgassing Poten-
following functions:
tial of Sealant Backing
1.2.1 Limits the amount and depth of sealant applied into a
D1622 Test Method for Apparent Density of Rigid Cellular
joint,
Plastics
1.2.2 Acts as a bond breaker to allow joint movement
D1623 Test Method for Tensile and Tensile Adhesion Prop-
without undue stress to the sealant,
erties of Rigid Cellular Plastics
1.2.3 Provides a form to assist the sealant in developing the
D5249 Specification for Backer Material for Use with Cold-
proper shape factor, and
and Hot-Applied Joint Sealants in Portland Cement Con-
1.2.4 Acts as a barrier to the flow of sealant through the
crete and Asphalt Joints
joint.
1.3 The committee with jurisdiction over this standard is not 3. Terminology
aware of any comparable standards published by other ASTM
3.1 Definitions—The definitions for the following terms
committees or other organizations.
used in this standard are found in Terminology C717:
1.4 This standard does not purport to address all of the
3.1.1 bi-cellular sealant backing, bond breaker, closed cell,
safety concerns, if any, associated with its use. It is the
joint, open cell, outgassing, seal, sealant, sealant backing, skin.
responsibility of the user of this standard to establish appro-
priate safety, health, and environmental practices and deter-
4. Classification
mine the applicability of regulatory limitations prior to use.
4.1 Cylindrical sealant backings are divided into three
1.5 This international standard was developed in accor-
types.
dance with internationally recognized principles on standard-
4.1.1 Type C—Cylindrical flexible sealant backings com-
ization established in the Decision on Principles for the
posed predominantly of closed cell material as defined in
Development of International Standards, Guides and Recom-
Terminology C717.
mendations issued by the World Trade Organization Technical
4.1.2 Type O—Cylindrical flexible sealant backings com-
Barriers to Trade (TBT) Committee.
posed of predominantly open cell material as defined in
2. Referenced Documents Terminology C717.
4.1.3 Type B—Cylindrical flexible sealant backings com-
2.1 ASTM Standards:
posed of bi-cellular material as defined in Terminology C717.
C717 Terminology of Building Seals and Sealants
5. Significance and Use
This specification is under the jurisdiction of ASTM Committee C24 on
5.1 This specification is designed to give some indication as
Building Seals and Sealants and is the direct responsibility of Subcommittee C24.10
on Specifications, Guides and Practices.
to the differences in performance for various cylindrical sealant
Current edition approved May 1, 2023. Published June 2023. Originally
backings.
approved in 1996. Last previous edition approved in 2018 as C1330 – 18. DOI:
10.1520/C1330-23.
5.2 Although this specification qualifies a cylindrical sealant
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
backing for use, it does not address the c
...
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: C1330 − 18 C1330 − 23
Standard Specification for
Cylindrical Sealant Backing for Use with Cold Liquid-
Applied Sealants
This standard is issued under the fixed designation C1330; 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 specification covers the basic requirements for cylindrical sealant backing to be used with cold liquid applied sealants
for use in building seals.
1.2 Cylindrical sealant backing serves one or more of the following functions:
1.2.1 Limits the amount and depth of sealant applied into a joint,
1.2.2 Acts as a bond breaker to allow joint movement without undue stress to the sealant,
1.2.3 Provides a form to assist the sealant in developing the proper shape factor, and
1.2.4 Acts as a barrier to the flow of sealant through the joint.
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.
2. Referenced Documents
2.1 ASTM Standards:
C717 Terminology of Building Seals and Sealants
C1016 Test Method for Determination of Water Absorption of Sealant Backing (Joint Filler) Material
C1087 Test Method for Determining Compatibility of Liquid-Applied Sealants with Accessories Used in Structural Glazing
Systems
This specification is under the jurisdiction of ASTM Committee C24 on Building Seals and Sealants and is the direct responsibility of Subcommittee C24.10 on
Specifications, Guides and Practices.
Current edition approved Sept. 15, 2018May 1, 2023. Published October 2018June 2023. Originally approved in 1996. Last previous edition approved in 20132018 as
C1330–02(2013).C1330 – 18. DOI: 10.1520/C1330-18.10.1520/C1330-23.
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
C1330 − 23
C1253 Test Method for Determining the Outgassing Potential of Sealant Backing
D1622 Test Method for Apparent Density of Rigid Cellular Plastics
D1623 Test Method for Tensile and Tensile Adhesion Properties of Rigid Cellular Plastics
D5249 Specification for Backer Material for Use with Cold- and Hot-Applied Joint Sealants in Portland Cement Concrete and
Asphalt Joints
3. Terminology
3.1 Definitions—The definitions for the following terms used in this standard are found in Terminology C717:
3.1.1 bi-cellular sealant backing, bond breaker, closed cell, joint, open cell, outgassing, seal, sealant, sealant backing, skin.
4. Classification
4.1 Cylindrical sealant backings are divided into three types.
4.1.1 Type C—cylindricalCylindrical flexible sealant backings composed predominatelypredominantly of closed cell material as
defined in Terminology C717.
4.1.2 Type O—cylindricalCylindrical flexible sealant backings composed of predominantly open cell material
...
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