ASTM C 961 (C-961) 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.
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Recommended Test Machine
Forces up to 10 kN (2,250 lbf)
Low force tabletop systems
Modular series of five frame options with adjustable test space
Affordable testing option for tension, compression, bend, peel and much more
Forces up to 5 kN (1,125 lbf)
Low force tabletop systems
Tests at speeds up to 2,500 mm/min (100 in/min)
Best for high travel or high elongation test requirements
Force range of 5 kN to 600 kN (1,125 lbf to 135,000 lbf)
Adjustable test space
The most popular choice for static tension and compression tests
These dual column testers are available in both tabletop and floor standing models
Recommended Testing Accessories
Rated to 5 kN (1,125 lbf)
Maximum specimen thicknesses from 24 mm to 100 mm (1 in. to 4 in.)
Simple yet strong design can be used for a multitude of tensile applications
Works well with flat or round specimens
