Sika Primer-215 / Sika Primer - 290DC is suitable for application to the following substrates: plastics such as GRP, epoxy resins, PVC, ABS and timber. Because plastics vary so much in their chemical composition, preliminary trials are necessary. This product must not be used on plastics that are prone to stress cracking such as acrylics or polycarbonates. This product is suitable for experienced professional users only. Test with actual substrates and conditions have to be performed to ensure adhesion and material compatibility.