26:1 or better Thrust Ratio Professional Caulk Gun required Large Nozzle Betaseal U418 Quick Cure Automotive Primerless Urethane Adhesive (2) 10oz. Tubes Professional use product. *Seller highly recommends buyer use a qualified glass installer for use of this product. A Dow Chemical OEM product For use on all auto glass installations Primerless urethane - no primers to glass required meets all federal retention and roof crush tests. For Fresh Paint and Bare / Exposed Scratched Metal, or urethane is to be applied to plastic or encapsulated parts then Dow primer #5504G must be applied to those areas for safe adhesion. * Waiver of liability* By purchasing this product buyer assumes all liability with regard to its proper use and application. The seller highly recommends buyer use a professional auto glass installer for proper knowledge and use of this product. The buyer agrees to hold harmless the seller and manufacturer for any liability with regard to the use and handling of this professional product. The buyer understands that by purchasing this product to use themselves without the use of a professional as recommend by the seller and manufacturer serious injury or death may result.