The Camco Pro-Strength Pro-Tec Rubber Roof Protectant is step two of a two-step system. When The Pro-Strength Pro-Tec Rubber Roof Protectant is applied after the rubber roof has been thoroughly cleaned, it helps protect the rubber roof and reduce future maintenance. The Rubber Roof Protectant is specifically engineered to reduce roof chalking, resist dirt and protect against UV damage. 1 Gallon bottle.