ASTM C1249-93(2000)

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

SCOPE
1.1 This guide covers design and fabrication considerations for the edge seal of conventionally sealed insulating glass units, herrein 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 guide 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 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-Dec-1999
• ICS: 81.040.20 - Glass in building
• Technical Committee: C24 - Building Seals and Sealants
• Drafting Committee: C24.10 - Specifications, Guides and Practices

Relations

• Replaces: ASTM C1249-93 - Standard Guide for Secondary Seal for Sealed Insulating Glass Units for Structural Sealant Glazing Applications
• Effective Date: 01-Jan-2000
• Replaced By: ASTM C1249-06 - Standard Guide for Secondary Seal for Sealed Insulating Glass Units for Structural Sealant Glazing Applications
• Effective Date: 01-Aug-2006
• Referred By: ASTM C1401-23 - Standard Guide for Structural Sealant Glazing
• Effective Date: 01-Jan-2000
• Referred By: ASTM C1193-16(2023) - Standard Guide for Use of Joint Sealants
• Effective Date: 01-Jan-2000
• Referred By: ASTM E2190-19 - Standard Specification for Insulating Glass Unit Performance and Evaluation
• Effective Date: 01-Jan-2000
• Referred By: ASTM C1369-19 - Standard Specification for Secondary Edge Sealants for Structurally Glazed Insulating Glass Units
• Effective Date: 01-Jan-2000

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:C1249–93 (Reapproved 2000)
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.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (e) 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 informa-
tioncontainedhereinmaybeofbenefittothedesignersofsuch
IG units.
1.3 In an SSG system, IG units are retained to a metal
FIG. 1 Sealed IG Edge Seal: Basic Components
framingsystembyastructuralseal(Fig.2).Thesizeandshape
of that seal, as well as numerous other SSG system design
C1135 Test Method for Determining Tensile Adhesion
considerations, are not addressed in this guide.
2
Properties of Structural Sealants
1.4 The values stated in SI units are to be regarded as the
2
C1184 Specification for Structural Silicone Sealants
standard. The values given in parentheses are for information
2
E631 Terminology of Building Constructions
only.
E773 Test Method for Seal Durability of Sealed Insulating
1.5 This standard does not purport to address all of the
2
Glass Units
safety problems, if any, associated with its use. It is the
2
E774 Specification for Sealed Insulating Glass Units
responsibility of the user of this standard to establish appro-
2.2 Other Standards:
priate safety and health practices and determine the applica-
Sigma 73-8-2B Test Methods for Chemical Effects of
bility of regulatory limitations prior to use.
3
Glazing Compounds on Elastomeric Edge Seals
2. Referenced Documents
3. Terminology
2.1 ASTM Standards:
3.1 Definitions:
C639 Test Method for Rheological (Flow) Properties of
2 3.1.1 Refer to Terminology C717 for definitions of the
Elastomeric Sealants
following terms used in this guide: adhesive failure, bead,
C679 Test Method for Tack-Free Time of Elastomeric
2 cohesive failure, compatibility, cure, elongation, gasket, glaz-
Sealants
2 ing, joint, lite, modulus, non-sag sealant, seal, sealant, sealant
C717 Terminology of Building Seals and Sealants
backing, setting block, shelf-life, silicone sealant, spacer,
C794 Test Method for Adhesion-in-Peel of Elastomeric
2
structural sealant, substrate, tooling, and working life. Refer to
Joint Sealants
Terminology E631 for the definition of sealed insulating glass
C1087 Test Method for Determining Compatibility of
as used in this guide.
Liquid-Applied Sealants with Accessories Used in Struc-
2 3.2 Definitions of Terms Specific to This Standard:
tural Glazing Systems
3.2.1 desiccant—a hygroscopic material that adsorbs water
or may adsorb solvent vapors, or both (see Fig. 1).
3.2.1.1 Discussion—The desiccant maintains a low relative
1
ThisguideisunderthejurisdictionofASTMCommitteeC24onBuildingSeals
humidity in sealed insulating glass.
and Sealants and is the direct responsibility of Subcommittee C24.10 on Specifi-
cations, Guides and Practices.
Current edition approved Sept. 15, 1993. Published November 1993.
2 3
Annual Book of ASTM Standards, Vol 04.07. Available from SIGMA, 111 E. Wacker Dr., Ste. 600, Chicago, IL 60601.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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C1249–93 (2000)
FIG. 2 Typical A-Side SSG System Mullion: Horizontal Section (Vertical Joint)
3.2.2 primary seal—Ajoint seal of which the sealant resists 4.2 Thisguideprovidesinformationonsiliconesealantsthat
moisture vapor permeation into the desiccated space of sealed are used for the secondary seal of IG units that are glazed into
insulating glass (see Fig. 1). SSG systems.
3.2.2.1 Discussion—It also resists inert gas permeation (for 4.3 Information is also provided on the other major compo-
example,argon)fromtheIGunitsealedspaceiftheintentisto nents of the IG unit edge seal, compatibility of components,
use an inert gas. durability, and quality assurance (QA).
3.2.3 secondary seal—a joint seal of which the sealant
5. Insulating Glass Unit
structurally unites the two glass lites and spacer of sealed
insulating glass (see Fig. 1).
5.1 Insulating Glass Unit Components—Th
...