Bond strength and pull-off testing refer to a test method outlined in ASTM C1583 and D4541. This type of testing is used to evaluate and provide a qualitative value of coatings applied to a concrete or other substrate surface. The test result provides a quantifiable value that conveys the amount of force needed to separate the coating from the substrate. Pull-off and bond strength testing provides a popular method of testing both the adequacy of a coating’s adhesion, as well as its point of failure. In order to test the pull-off strength of a coating on concrete, the technician would use one of the variety of pull-off testers supplied by M&L, such as Proceq’s DY-2 Pull-off Tester or our HC-2988A Bond Test Kit.

The bonding strengths of a wide and varied range of materials including concrete, screeds, repair mortars, epoxy resin coatings, laminates, plastics, paints and enamels may be accurately determined using this Bond Tester. Adequate direct tensile strength or bonding strength between two layers is important if repairs to concrete structures or additional overlays and screeding on existing concrete is to be structurally sound.