ASTM C1518-22

Standard Specification for Precured Elastomeric Silicone Joint Sealants

ABSTRACT
This specification describes the properties of applied, flat shaped precured elastomeric silicone joint sealants that bridge joint openings and are adhered to joint substrates utilizing a liquid applied silicone adhesive sealant to seal building openings such as panel joints, metal flashing joints, or other building openings in place of conventional liquid applied sealants. Seals are applied in three different configurations, as follows: as a bridge joint, the seal is applied flat on the surface to cover a joint opening; as a beveled bridge joint, the seal is applied on the beveled edge of a substrate to bridge a joint opening.; as a U-joint, the seal is applied in a U-configuration within a joint. Seals are classified into Movement Classes on the basis of movement capability, and Tear Class on the basis of tear propagation. Seals should adhere to specified requirements as to stability, color and texture, application, adhesion and cohesion, and movement, modulus, and tear characteristics.
SCOPE
1.1 Precured elastomeric silicone joint sealants, hereinafter referred to as seal, are manufactured in flat, cured, extruded shapes and are primarily used to span joint openings in construction. This specification describes the properties of applied, flat shaped precured elastomeric silicone joint sealants, hereinafter referred to as applied seal, that bridge joint openings and are adhered to joint substrates utilizing a liquid applied silicone adhesive sealant, specified by the manufacturer, hereinafter referred to as adhesive to construction substrates, to seal building openings such as panel joints, metal flashing joints, or other building openings in place of conventional liquid applied sealants.  
1.2 Seals are applied in three different configurations:  
1.2.1 As a bridge joint, the seal is applied flat on the surface to cover a joint opening. See Fig. 1.
FIG. 1 Bridge Joint Configuration  
1.2.2 As a beveled bridge joint, the seal is applied on the beveled edge of a substrate to bridge a joint opening. See Fig. 2.  
FIG. 2 Beveled Bridge Joint Configuration  
1.2.3 As a U-joint, the seal is applied in a U-configuration within a joint. See Fig. 3.
FIG. 3 U-Joint Configuration  
1.3 This specification is for a flat extruded shape.  
1.4 An applied seal meeting the requirements of this specification shall be designated by the manufacturer as to movement class and tear class as described in Section 5.  
1.5 The values stated in SI units are to be regarded as standard. The values given in parentheses after SI units are provided for information only and are not considered standard.  
1.6 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: 31-May-2022
• ICS: 83.060 - Rubber
• Technical Committee: C24 - Building Seals and Sealants
• Drafting Committee: C24.10 - Specifications, Guides and Practices

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: C1518 −22
Standard Specification for
1
Precured Elastomeric Silicone Joint Sealants
This standard is issued under the fixed designation C1518; 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 2. Referenced Documents
2
2.1 ASTM Standards:
1.1 Precured elastomeric silicone joint sealants, hereinafter
C717 Terminology of Building Seals and Sealants
referred to as seal, are manufactured in flat, cured, extruded
C1442 Practice for Conducting Tests on Sealants Using
shapes and are primarily used to span joint openings in
Artificial Weathering Apparatus
construction. This specification describes the properties of
C1523 Test Method for Determining Modulus, Tear and
applied, flat shaped precured elastomeric silicone joint
Adhesion Properties of Precured Elastomeric Joint Seal-
sealants,hereinafterreferredtoasappliedseal,thatbridgejoint
ants
openings and are adhered to joint substrates utilizing a liquid
D1566 Terminology Relating to Rubber
applied silicone adhesive sealant, specified by the
G113 Terminology Relating to Natural andArtificial Weath-
manufacturer, hereinafter referred to as adhesive to construc-
ering Tests of Nonmetallic Materials
tion substrates, to seal building openings such as panel joints,
metal flashing joints, or other building openings in place of
3. Terminology
conventional liquid applied sealants.
3.1 Definitions:
1.2 Seals are applied in three different configurations:
3.1.1 Refer to Terminology C717 for definitions of terms
1.2.1 As a bridge joint, the seal is applied flat on the surface
used in this standard, including but not limited to the follow-
to cover a joint opening. See Fig. 1.
ing: cohesive failure, adhesive failure, elastomeric, elongation,
1.2.2 As a beveled bridge joint, the seal is applied on the
joint, modulus, primer, seal, sealant, shelf-life, substrate.
beveled edge of a substrate to bridge a joint opening. See Fig.
3.1.2 Refer to Terminology G113 for definitions related to
2.
artificial weathering.
1.2.3 As a U-joint, the seal is applied in a U-configuration
3.1.3 Refer to Terminology D1566 for tear.
within a joint. See Fig. 3.
4. Significance and Use
1.3 This specification is for a flat extruded shape.
4.1 This specification describes several classifications of
1.4 An applied seal meeting the requirements of this speci-
appliedsealsasdescribedinSection5.Thepurchaserordesign
fication shall be designated by the manufacturer as to move-
professional shall recognize that not all materials meeting this
ment class and tear class as described in Section 5.
specification are suitable for all applications and substrates. It
is essential, therefore, that the proper classification of the seal
1.5 The values stated in SI units are to be regarded as
system is provided for the intended use. The test methods in
standard. The values given in parentheses after SI units are
this specification relate to elastomeric performance, adhesion
provided for information only and are not considered standard.
of the adhesive to the seal and adhesion of the adhesive to the
1.6 This international standard was developed in accor-
substrate, only as adhesion relates to the test specimens. The
dance with internationally recognized principles on standard-
standard substrate for qualification to this specification is
ization established in the Decision on Principles for the
portland cement mortar. The standard joint configuration for
Development of International Standards, Guides and Recom-
qualification to this specification is the bridge joint configura-
mendations issued by the World Trade Organization Technical
tion as shown in Fig. 1. Users are advised to have adhesion
Barriers to Trade (TBT) Committee.
evaluations performed in the field on the actual substrate(s) to
determine adhesion performance.
NOTE 1—Other joint configurations such as beveled bridge joint
1
This specification is under the jurisdiction of ASTM Committee C24 on
Building Seals and Sealants and is the direct responsibility of Subcommittee C24.10
2
on Specifications, Guides and Practices. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved June 1, 2022. Published June 2022. Originally contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
approved in 2002. Last previous edition approved in 2016 as C1518–16. DOI: Standards volume information, refer to the standard’s Document Summary page on
10.1520/C1518-22. the ASTM web
...

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: C1518 − 16 C1518 − 22
Standard Specification for
1
Precured Elastomeric Silicone Joint Sealants
This standard is issued under the fixed designation C1518; 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 Precured elastomeric silicone joint sealants, hereinafter referred to as seal, are manufactured in flat, cured, extruded shapes and
are primarily used to span joint openings in construction. This specification describes the properties of applied, flat shaped precured
elastomeric silicone joint sealants, hereinafter referred to as applied seal, that bridge joint openings and are adhered to joint
substrates utilizing a liquid applied silicone adhesive sealant, specified by the manufacturer, hereinafter referred to as adhesive to
construction substrates, to seal building openings such as panel joints, metal flashing joints, or other building openings in place
of conventional liquid applied sealants.
1.2 Seals are applied in three different configurations:
1.2.1 As a bridge joint, the seal is applied flat on the surface to cover a joint opening. See Fig. 1.
1.2.2 As a beveled bridge joint, the seal is applied on the beveled edge of a substrate to bridge a joint opening. See Fig. 2.
1.2.3 As a U-joint, the seal is applied in a U-configuration within a joint. See Fig. 3.
1.3 This specification is for a flat extruded shape. A three-dimensional shape used at a joint cross section or termination is being
considered for future inclusion in the specification.
1.4 An applied seal meeting the requirements of this specification shall be designated by the manufacturer as to movement class
and tear class as described in Section 5.
1.5 The values stated in SI units are to be regarded as the standard. The values given in brackets are for information
only.parentheses after SI units are provided for information only and are not considered standard.
1.6 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
2.1 ASTM Standards:
1
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 June 1, 2016June 1, 2022. Published July 2016June 2022. Originally approved in 2002. Last previous edition approved in 20142016 as
C1518 - 04 (2014).C1518–16. DOI: 10.1520/C1518-16.10.1520/C1518-22.
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

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C1518 − 22
FIG. 1 Bridge Joint Configuration
FIG. 2 Beveled Bridge Joint Configuration
FIG. 3 U-Joint Configuration
C717 Terminology of Building Seals and Sealants
C1442 Practice for Conducting Tests on Sealants Using Artificial Weathering Apparatus
C1523 Test Method for Determining Modulus, Tear and Adhesion Properties of Precured Elastomeric Joint Sealants
D1566 Terminology Relating to Rubber
G113 Terminology Relating to Natural and Artificial Weathering Tests of Nonmetallic Materials
3. Terminology
3.1 Definitions:
3.1.1 Refer to Terminology C717 for definitions of terms used in this standard, including but not limited to the following: cohesive
failure, adhesive failure, elastomeric, elongation, joint, modulus, primer, seal, sealant, shelf-life, substrate.
3.1.2 Refer to Terminology G113 for definitions related to artificial weathering.
3.1.3 Refer to Terminology D1566 for tear.
4. Significance and Use
4.1 This specification describes several classifications of applied seals as described in Section 5. The purchaser or design
professional shall recognize that not all materials meeting this specification are suitable for all applications and substrates. It is
essential, therefore, that the proper classification of
...