ASTM C 1249 REV A Standard Guide for Secondary Seal for Sealed Insulating Glass Units for Structural Sealant Glazing Applications
ASTM C 1249结构密封胶装配玻璃用密封绝热玻璃单元二次密封的标准指南
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.
This guide provides information on silicone sealants that are used for the secondary seal of IG units that are glazed into SSG systems.
Information is also provided on the other major components of the IG unit edge seal, compatibility of components, durability, and quality assurance (QA).
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, 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.
1.6 The committee with jurisdiction for this standard is not aware of any comparable standard guides published by other organizations.
2. Referenced Documents (purchase separately)
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
E631 Terminology of Building Constructions
E773 Test Method for Accelerated Weathering of Sealed Insulating Glass Units
E774 Specification for the Classification of the Durability of Sealed Insulating Glass Units
E2188 Test Method for Insulating Glass Unit Performance
E2189 Test Method for Testing Resistance to Fogging in Insulating Glass Units
E2190 Specification for Insulating Glass Unit Performance and Evaluation
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
E631 Terminology of Building Constructions
E773 Test Method for Accelerated Weathering of Sealed Insulating Glass Units
E774 Specification for the Classification of the Durability of Sealed Insulating Glass Units
E2188 Test Method for Insulating Glass Unit Performance
E2189 Test Method for Testing Resistance to Fogging in Insulating Glass Units
E2190 Specification for Insulating Glass Unit Performance and Evaluation
Other Standards
Igma73-8-2B Test Methods for Chemical Effects of Glazing Compounds on Elastomeric Edge Seals
Index Terms
adhesive failure; cohesive failure; edge seal; insulating glass; secondary seal; structural sealant; structural sealant glazing; Adhesive failure; Cohesive failure; Conventionally sealed insulating glass (IG) units; Durability--sealants; Edge seal/sealant; Insulating glass (IG); Sealants; Secondary sealants; SSG (structural sealant glazing) ; 
