Products / Karnak 670HS Karna-Sil Ultra

Karnak 670HS Karna-Sil Ultra is a white, single-component, high-solids, low-VOC, moisture-curing silicone roof coating for newly sprayed polyurethane foam, previously silicone-coated roofs, galvanized metal and concrete without primer, and for painted metal, single-ply, smooth BUR and modified bitumen over Karnak primers or base coats. Its product data sheet reports 94 percent solids by weight and 91 percent by volume and 212 percent elongation, lists ASTM D 6694, gives an initial SRI of 110 and a three-year aged SRI of 86 for white, and points to an NSF listing for rainwater catchment use.