Vulkem® Extreme Wear Systems (EWS) are composed of tough-curing, durable liquid polyurethane methacrylate (PUMA) — specifically designed for water feature applications including basins for fountains, waterfalls, reflecting pools, decorative ponds and the like. Waterproof Vulkem EWS systems provide superior resistance to the damaging effects of chlorine and UV exposure, and can be finished in over 70 field-tintable color options, decorative flakes or quartz.