Astm C920 Standard Specification For Elastomeric Joint Sealants Summary __hot__

: Tests durability under UV exposure and temperature cycles.

This is perhaps the most critical metric, measuring how much a sealant can expand or contract as a percentage of the original joint width. Movement Capability Common Applications Low-movement interior trim. 25 Most standard expansion joints and windows. 35/50 ±35% to ±50% High-movement curtain walls and glazing. 100/50 +100% / -50% : Tests durability under UV exposure and temperature cycles

Grade P (pourable or selfleveling) sealant shall have the required flow characteristics, it shall exhibit a smooth, level surface. ASTM International 25 Most standard expansion joints and windows

: Ensures the sealant won't discolor porous materials like marble or limestone. Common Product Examples Product Name Classification Example Gripbond PRO Go to product viewer dialog for this item. Type S, Grade NS, Class 35, Use NT, M, G, A, O General construction, interior/exterior Sikaflex-1A Go to product viewer dialog for this item. Type S, Grade NS, Class 35, Use T, NT, I, M, G, A Multi-purpose, including traffic and immersion Dymonic FC Go to product viewer dialog for this item. Type S, Grade NS, Class 50, Use NT, M, A, O High-movement facade and wall joints ASTM International : Ensures the sealant won't discolor

: Thicker consistency for vertical and overhead joints.

Manufacturers must designate sealants using this four-part system to specify exactly where and how a product should be used: : Indicates the number of components.