Carlisle Coatings & Waterproofing usese renewable resources in its new formula for CCW-500 Membrane. The membrane offers flexibility and crack-bridging ability. It resembles a rubber-like sheet upon curing and can be used on virtually an surface--vertical or horizontal—and now requires less heat for application, stays workable longer, and resists flow once its been set. The product has 30% recycled content and qualifies for LEED points. The product isn't made of volatile materials so does not leach heavy metals.