Sentence:  Common causes of CM failure include poor metal preparation, i.e., the presence of contamination on the metal before applicaton of adhesive, insufficient dry film thickness of primer, failure to properly agitate the adhasive to achieve a uniform dispersion prior to application, environmental attack (salt, water) on the primer/metal interface, dry spray of primar on to the metal (which does not allow the primer to adequately wet out the metal surface), or <WSD>sweepage</WSD> (when the flow of rubber strips some or all of the adhesive or primer film from the metal surface) of the primer and adhesive off the metal during injection or transfer moulding. 
Meaning of the word marked with <WSD> tags:  The movement of matter by a current.