This International Standard specifies methods for the determination of the modulus in shear and the strength of bonds of rubber to metal or other rigid plates, using rubber bonded between four parallel plates. Method A describes the determination of the modulus in shear. Method B describes the determination of the strength of the bonds. The methods are applicable primarily to test pieces prepared in the laboratory under standard conditions, such as can be used to provide data for the development and control of rubber compounds and methods of manufacture of bonded shear units.