Rust-Oleum Roof Patch Cleaner & Primer is a cleaner that clears away dirt and debris and contains an adhesion promoter to increase adhesion of roof patch and sealant products to existing roof substrates. When used with the Rust-Oleum Triple Thick Roof Patch & Sealer the quick-dry formulation is ideal for efficient roof repairs saving both time, and money while providing long-term protection from leaks.