ASTM C961 Lap Shear Sealants Test Equipment

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ASTM C961 determines the lap shear strength of sealants. It also provides information on the adhesive bond of the sealants to the tested substrates. The sealant is placed between two glass substrates. The sample is placed in a tensile tester and pulled at a constant rate to failure. The maximum shear force and mode of failure is noted. Maximum shear stress is calculated and reported.