Astm C920 Standard Specification For Elastomeric Joint Sealants Summary

The ASTM C920 standard specification provides a comprehensive framework for evaluating the performance of elastomeric joint sealants used in building construction. The standard outlines key requirements for classification, physical properties, and performance testing, ensuring that sealants meet minimum standards for durability and adhesion. By following the guidelines outlined in ASTM C920, manufacturers, specifiers, and contractors can ensure that elastomeric joint sealants are designed and installed to provide long-lasting, watertight seals in a variety of construction applications.

The standard provides a universal classification system—Type, Grade, Class, and Use—to help architects and contractors select the right product for specific applications like curtain walls, plaza decks, or window perimeters.

: M (Mortar), G (Glass), A (Aluminum), and O (Other substrates). Core Performance Tests It classifies sealants based on component (S/M), consistency

ASTM C920 is the standard specification for cold-applied elastomeric joint sealants in building construction, establishing requirements for type, grade, class, and use regarding durability, flexibility, and adhesion. It classifies sealants based on component (S/M), consistency (P/NS), movement capability, and environmental application. For complete details, visit ASTM . ASTM International +3 AI can make mistakes, so double-check responses Copy Creating a public link... You can now share this thread with others Good response Bad response 4 sites C920 Standard Specification for Elastomeric Joint Sealants Nov 22, 2024 —

ASTM C920 establishes the minimum performance requirements for cold-applied, elastomeric joint sealants used in building and civil engineering applications (e.g., curtain walls, pavement joints, window perimeters). and environmental application. For complete details

Gunnable sealants that stay in place without slumping, making them essential for vertical surfaces like wall expansion joints. 3. Class: Movement Capability

: For continuous liquid immersion (e.g., swimming pools). or window perimeters. : M (Mortar)

The ASTM C920 standard specifies the following key requirements for elastomeric joint sealants:

Every C920-compliant sealant is defined by four core categories: