Bond strength generally involves determining the stress required to rupture a bond formed by an adhesive between two metal blocks. Often, the test involves the measurement of the shear and flexural bond strength of a bonding agent or a comparison of bonding agents under varying environmental conditions. The test may compare the fractured surface produced to failure analysis results within the adhesive inter-phase region.

Orthodontics and medical adhesives are often tested using this method, although this general testing is used on a variety of products ranging from paper and laminates to linoleum and construction adhesives.

Typical graph showing bond strength test: