ASTM C961 – Standard Test Method for Lap Shear Strength of Sealants

ASTM C961  – This test method measures the cohesive strength of sealants when subjected to shear stresses, and also provides information regarding the adhesive

bond to the substrates being tested.

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.

Similar Standards 

ASTM C961 –  Lap Shear Sealants Test Equipment

ASTM D1002 – Lap Shear Testing for Adhesively Bonded Metals

ASTM D3163 – Lap Shear Rigid Plastic Test Equipment

ASTM D3164 – Lap-Shear Sandwich Testing Machine

ASTM D3528 – Tension Strength of Double Lap Shear Adhesive Joints

ASTM D5656 – Thick-Adherend Metal Lap-Shear Testing of Adhesives in Shear by Tension Loading

ASTM D5868 – Lap Shear Adhesion Plastic Bonding

ASTM D7616 – Overlap Splice Shear Strength of Wet Lay-Up Fiber-Reinforced Polymer Matrix

ASTM F2255 – Tension Lap Shear Strength Tissue Adhesives Test Equipment

Referenced Documents  

ASTM Standards

C717 Terminology of Building Seals and Sealants