Products / Atlas Gorilla Guard Premium Underlayment

Gorilla Guard is Atlas's premium woven-fabric synthetic roof underlayment for steep-slope roofs under asphalt shingles, metal, clay and concrete tile, slate and wood shingles and shakes, with a dual-coated slip-resistant resin and a non-woven walking surface. Atlas's product page lists 180-day UV exposure, performance from -40 to 240 degrees F, and qualification as an Atlas Signature Select system component.