Pur 450 Pu Waterproofing Membrane One part, easy to apply, specially formulated polyurethane based, elastic, crack bridging membrane. It cures to form a highly elastic, seamless, waterproof coating with excellent crack bridging properties. Its performance is maintained even at low temperatures. Excellent Adhesion Easy application May be applied interior and exterior areas Crack Bridging Highly elastic Economical in use Silk/matt appearance Root penetration resistant