Elastomeric hybrid membrane for roof insulation. It is based on new technology acrylic and polyurethane resins. It exhibits excellent adhesion to suitably prepared surfaces and follows the contractions and expansions they exhibit. It has the properties of a cool material, presenting satisfactory solar reflection thus contributing to thermal comfort as well as energy resource savings. It contains specialized additives that prevent the growth of microorganisms on the material's film and maintains high resistance even in standing water.