Sika P2G Automotive Urethane Adhesive If bare metal is exposed or urethane is to be applied to plastic or encapsulated parts then Sika Primer 207 must be applied to those areas for safe adhesion. See our Store 26:1 or better Thrust Ratio Professional Caulk Gun required to dispense this Product Primerless to Glass 1 Case (10) 300ml Tubes BLACK w/ 8 Nozzles (Reuse Nozzles to reduce urethane waste) Great adhesive product for most materials, waterproof, superior bonding Professional use product. *Seller highly recommends buyer use a qualified glass installer for use of this product. For use on all auto glass installations Primerless urethane - no primers to glass required meets all federal retention and roof crush tests.