Urethane Window Fixtures ( 2-Urethane 1-Primer) . The kit is ideally used for 1 Large Side Window Part # VWD-INST1SNG ** Shelf life 3-6 months Sikaflex P2G exceeds all federal requirements for FMVSS 212 / 208. This Urethane Adhesive can be used primer-less on Windshields. however; We recommend using primer on the side windows, unlike most windshields the side windows are vertical and the primer will bond to the van walls easily for a proper installation. Sikaflex P2G Urethane Adhesive is designed for use in replacing direct-glazed automotive glass windows. Primerless to glass 6-hour Safe Drive Away Time (leave window taped in place for a minimum 24hrs) Exceeds FMVSS 212/208 Single Application Primer acts as the base layer on your van wall to ensure proper adhesion of the urethane. Single Application Primer is a solvent-based black primer, which reacts with moisture and forms a thin layer. This layer acts as a link between substrates and adhesives. Primer fluoresces under long-wave UV light for a limited period of time. This feature is used for in-process control. Enhanced adhesion on a wide variety of substrates Visible under UV light Easy to use A standard Caulking Gun will not suffice for automotive urethane. Use a 26:1 Ratio Caulk Gun to ensure a more professional installation