: Ability to maintain adhesion and cohesion during repeated expansion and contraction. Adhesion-in-Peel : Strength of the bond to the substrate.
To meet ASTM C920, a sealant must pass a battery of rigorous tests: astm c 920
ASTM C920 remains the gold standard for specifying elastomeric joint sealants in the construction industry. By requiring stringent adhesion, movement, and weathering tests, it ensures that the sealant will perform for years in demanding environments. For any building joint that moves, look for the ASTM C920 label – and verify the Class and Grade to match your application’s needs. : Ability to maintain adhesion and cohesion during