Adhesion is the bond strength measurement of a coating to a substrate. When an adhesive is bonded to an item or surface, numerous physical, mechanical and chemical forces come into play, which may have an effect on each other. These need to be tested before a product can be used. One of the primary features of closed cell polyurethane chemistry is the adhesion strength on almost any substrate.
Determination of the failure point can be critical for the final use of the material and the adhesive. There are a large number of different adhesive products, which require different testing methods to characterise the properties of the material. Some examples include substrates, glue, creams, gels, paints and varnishes and bonding of different materials together in layers, which all require a different adhesive test, some times called pull testing. We decided to test the Dry Wall Adhesive and the Black Can Foam to show you how strong these polyurethane foam sealants are.
Determination of the failure point can be critical for the final use of the materials, depending on the final product they have been designed for. Tests can also be done at different temperatures to simulate real world use for the materials. Material characteristics can change at high or low temperatures due to expansion and contraction. Hopefully this Spray Sealants Blog post can help you to determine which sealants you should choose when considering your next air sealing project.