ASTM C1249-18

Standard Guide for Secondary Seal for Sealed Insulating Glass Units for Structural Sealant Glazing Applications

SIGNIFICANCE AND USE
4.1 It should be realized that the design of an IG unit edge seal for use in SSG systems is a collaborative effort of at least the IG unit fabricator, sealant manufacturer, and design professional, among others.  
4.2 This guide provides information on silicone sealants that are used for the secondary seal of IG units that are glazed into SSG systems.  
4.3 Information is also provided on the other major components of the IG unit edge seal, compatibility of components, durability, and quality assurance (QA).
SCOPE
1.1 This guide covers design and fabrication considerations for the edge seal of conventionally sealed insulating glass units, herein referred to as IG units. The IG units described are used in structural silicone sealant glazing systems, herein referred to as SSG systems. SSG systems typically are either two or four sided, glazed with a structural sealant. Other conditions such as one, three, five, six sided may be used.  
1.2 This guides does not cover the IG units of other than conventional edge seal design (Fig. 1); however, the information contained herein may be of benefit to the designers of such IG units.
FIG. 1 Sealed IG Edge Seal: Basic Components  
1.3 In an SSG system, IG units are retained to a metal framing system by a structural seal (Fig. 2). The size and shape of that seal, as well as numerous other SSG system design considerations, are not addressed in this guide.
FIG. 2 Typical A-Side SSG System Mullion: Horizontal Section (Vertical Joint)  
1.4 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.  
1.5 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.  
1.6 The committee with jurisdiction for this standard is not aware of any comparable standard guides published by other organizations.  
1.7 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: Historical
• Publication Date: 31-May-2018
• ICS: 81.040.20 - Glass in building
• Technical Committee: C24 - Building Seals and Sealants
• Drafting Committee: C24.10 - Specifications, Guides and Practices

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: C1249 − 18
Standard Guide for
Secondary Seal for Sealed Insulating Glass Units for
1
Structural Sealant Glazing Applications
This standard is issued under the fixed designation C1249; 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 mendations issued by the World Trade Organization Technical
Barriers to Trade (TBT) Committee.
1.1 This guide covers design and fabrication considerations
for the edge seal of conventionally sealed insulating glass
2. Referenced Documents
units, herein referred to as IG units. The IG units described are
2
2.1 ASTM Standards:
used in structural silicone sealant glazing systems, herein
C639 Test Method for Rheological (Flow) Properties of
referred to as SSG systems. SSG systems typically are either
Elastomeric Sealants
two or four sided, glazed with a structural sealant. Other
C679 Test Method for Tack-Free Time of Elastomeric Seal-
conditions such as one, three, five, six sided may be used.
ants
1.2 This guides does not cover the IG units of other than
C717 Terminology of Building Seals and Sealants
conventional edge seal design (Fig. 1); however, the informa-
C794 Test Method for Adhesion-in-Peel of Elastomeric Joint
tion contained herein may be of benefit to the designers of such
Sealants
IG units.
C1087 Test Method for Determining Compatibility of
1.3 In an SSG system, IG units are retained to a metal
Liquid-Applied Sealants with Accessories Used in Struc-
framing system by a structural seal (Fig. 2). The size and shape tural Glazing Systems
of that seal, as well as numerous other SSG system design
C1135 Test Method for Determining Tensile Adhesion Prop-
considerations, are not addressed in this guide. erties of Structural Sealants
C1184 Specification for Structural Silicone Sealants
1.4 The values stated in SI units are to be regarded as the
C1369 Specification for Secondary Edge Sealants for Struc-
standard. The values given in parentheses are for information
turally Glazed Insulating Glass Units
only.
E631 Terminology of Building Constructions
1.5 This standard does not purport to address all of the
E773 Test Method for Accelerated Weathering of Sealed
safety concerns, if any, associated with its use. It is the
3
Insulating Glass Units (Withdrawn 2010)
responsibility of the user of this standard to establish appro-
E2188 Test Method for Insulating Glass Unit Performance
priate safety, health, and environmental practices and deter-
E2189 Test Method for Testing Resistance to Fogging in
mine the applicability of regulatory limitations prior to use.
Insulating Glass Units
1.6 The committee with jurisdiction for this standard is not
E2190 Specification for Insulating Glass Unit Performance
aware of any comparable standard guides published by other
and Evaluation
organizations.
4
2.2 IGMA Standards:
1.7 This international standard was developed in accor-
TR-1000-75(91) Voluntary Test Methods for Chemical Ef-
dance with internationally recognized principles on standard-
fects of Glazing Compounds on Elastomeric Edge Seals
ization established in the Decision on Principles for the
Development of International Standards, Guides and Recom-
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
1
This guide is under the jurisdiction of ASTM Committee C24 on Building Seals Standards volume information, refer to the standard’s Document Summary page on
and Sealants and is the direct responsibility of Subcommittee C24.10 on the ASTM website.
3
Specifications, Guides and Practices. The last approved version of this historical standard is referenced on www.ast-
Current edition approved June 1, 2018. Published July 2010. Originally approved m.org.
4
in 1993. Last previous edition approved in 2006 as C1249–06a. DOI: 10.1520/ Available from Insulating Glass Manufacturers Alliance (IGMA), 1500 Bank
C1249-18. St., Ottawa, ON K1H 1B8, Canada, https://www.igmaonline.org/.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
C1249 − 18
3.2.5 structural seal—a joint seal of which the sealant
structurally adheres an IG unit to a metal framing system (see
Fig. 2).
3.2.5.1 Discussion—The structural seal transfers applied
loads to the framing system as well as accommodates differ-
ential movements between the IG unit and the framing system.
3.3 Symbols:
2 2
3.3.1 A = area, m (in. ).
3.3.2 C = sealant contact width, shear, mm (in.).
s
3.3.3 C = sealant contact
...

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: C1249 − 06a (Reapproved 2010) C1249 − 18
Standard Guide for
Secondary Seal for Sealed Insulating Glass Units for
1
Structural Sealant Glazing Applications
This standard is issued under the fixed designation C1249; 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 guide covers design and fabrication considerations for the edge seal of conventionally sealed insulating glass units,
herein referred to as IG units. The IG units described are used in structural silicone sealant glazing systems, herein referred to as
SSG systems. SSG systems typically are either two or four sided, glazed with a structural sealant. Other conditions such as one,
three, five, six sided may be used.
1.2 This guides does not cover the IG units of other than conventional edge seal design (Fig. 1); however, the information
contained herein may be of benefit to the designers of such IG units.
1.3 In an SSG system, IG units are retained to a metal framing system by a structural seal (Fig. 2). The size and shape of that
seal, as well as numerous other SSG system design considerations, are not addressed in this guide.
1.4 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
1.5 This standard does not purport to address all of the safety problems,concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appropriate safety safety, health, and healthenvironmental practices and
determine the applicability of regulatory limitations prior to use.
1.6 The committee with jurisdiction for this standard is not aware of any comparable standard guides published by other
organizations.
1.7 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:
C639 Test Method for Rheological (Flow) Properties of Elastomeric Sealants
C679 Test Method for Tack-Free Time of Elastomeric Sealants
C717 Terminology of Building Seals and Sealants
C794 Test Method for Adhesion-in-Peel of Elastomeric Joint Sealants
C1087 Test Method for Determining Compatibility of Liquid-Applied Sealants with Accessories Used in Structural Glazing
Systems
C1135 Test Method for Determining Tensile Adhesion Properties of Structural Sealants
C1184 Specification for Structural Silicone Sealants
C1369 Specification for Secondary Edge Sealants for Structurally Glazed Insulating Glass Units
E631 Terminology of Building Constructions
3
E773 Test Method for Accelerated Weathering of Sealed Insulating Glass Units (Withdrawn 2010)
3
E774 Specification for the Classification of the Durability of Sealed Insulating Glass Units (Withdrawn 2006)
E2188 Test Method for Insulating Glass Unit Performance
1
This guide 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, 2010June 1, 2018. Published July 2010. Originally approved in 1993. Last previous edition approved in 2006 as C1249–06a. DOI:
10.1520/C1249-06AR10.10.1520/C1249-18.
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.
3
The last approved version of this historical standard is referenced on www.astm.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
C1249 − 18
FIG. 1 Sealed IG Edge Seal: Basic Components
E2189 Test Method for Testing Resistance to Fogging in Insulating Glass Units
E2190 Specification for Insulating Glass Unit Performance and Evaluation
4
2.2 OtherIGMA Standards:
Igma 73-8-2B TR-1000-75(91) Voluntary Test Methods for Chemical Effects of Glazing Compounds on Elastomeric Edge Seals
TM-4000 Insulating Glass Manufacturing Quality Procedures
5
...