COOLGUARD™ Roof Waterproofing is a powerful, thick, high-performance, 100% elastomeric, single-component acrylic urethane roof sealant for waterproofing roofs and walls. Provides a monolithic layer that waterproofs and insulates temperature. It significantly reduces the interior temperature of the structure in two ways: 1- Reflecting 79% of all solar rays and eliminating 89% of all heat received by the roof surface. 2- It uses Thermaflex Technology, with tiny insulation microspheres that dramatically increase their volume as the outside temperature increases, preventing the surface from absorbing heat.