DERBIFLASH MS Primer is a quick-dry high bonding primer agent used between acceptable prepared substrates and DERBIGUM Liquid Applied Systems. It is a solvent free, 2-part, high solids, cold-applied liquid polyurethane resin. DERBIFLASH MS Primer used to prime a wide range of substrates including bitumen roofing, plywood, steel, aluminum, lead, copper, zinc and glass. The MS Primer is available in DERBIFLASH MS kits. It is extremely fast curing. Excessive mixing time reduces the available work time for the primer.