RECENT TRENDS IN SEALANT ADHESION TESTS

An update on sealant adhesion testing

N.E.SHEPHARD

Sealants Science and Technology, Dow Corning Corporation, Midland, USA

Abstract

A sealant is a special type of adhesive which is used in joints undergoing substantial dimensional changes. The sealant accommodates the joint movements and prevents moisture and dirt from entering the joint. In order to fulfil its function, the sealant needs to adhere to the substrate. Wherever two different materials come in contact, an interphase is formed. The strength of this interphase plays a significant role in the overall performance of the joint. Typical sealant adhesion tests require cohesive failure in the sealant as the most important indicator of a strong bond. ...

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