The Bio-Kleen Black Streak Remover is a biodegradable, non-toxic RV and boat black streak remover, cleaner, and degreaser. Specifications•Unit Size: 1 Gallon•Unit Type: Jug•Unit Quantity: Single•Packaging Language: English Just Spray It On A Cloth Or Brush & Wipe It On & Wipe It Off, It Really Is That Simple Also A Multi Purpose Cleaner Degreaser That Cleans Soils & Marks With A Minimum Effort On A Wide Variety Of Hard Surfaces After Cleaning It Leaves Surfaces Streak Free. No Need To Rinse & Surface Is Residue Free