Code: 12450010-39 Without pretreatment, many plastics will not bond, or will only bond under certain conditions. When these plastics are pretreated with WEICON Contact Primer, their surface structure changes. Thus, it is possible to join plastics belonging to the polyolefin group such as polyethylene (PE) and polypropylene (PP). In addition, modern thermoplastic elastomers (TPE), PTFE and similar plastics and silicones can be bonded after pre-treatment with WEICON Contact Primer.