Karnak #407 EPDM & SPF is a 100% acrylic elastomeric co-polymer emulsion, specifically designed as a base coating for adhesion to EPDM and SPF (Spray polyurethane foam) roofing membranes and systems. The technology used in #407 EPDM & SPF enables the coating to have very good adhesion and resistance to blistering when applied to EPDM or SPF roofing systems. When applied to a suitably cleaned EPDM or SPF roofs and top coated with a durable acrylic elastomeric finish coat such as 535 QS Enviro-Lastic, 501 Elasto-Brite or 529 Renu-White, the coatings can extend the life of the existing roof membrane.