ASTM C 907 (C-907) determines the tensile adhesive strength of a preformed tape sealant. The type of failure can be determined, and the degree of cohesive/adhesive failure can be estimated.The preformed tape sealant is compressed between two aluminum disks. The disks are pulled apart to failure. The maximum tensile strength and failure mode are recorded using ASTM C907. Preformed tape sealants are tacky, deformable solids that are used under compression between two or more substrates, in various sealing applications where the surfaces may be of similar or dissimilar materials. This procedure measures the tensile strength of the preformed tape sealant. It also provides an indication of the cohesive nature and adhesive bonding properties of the preformed tape sealant. This procedure is not intended to simulate actual use conditions.

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