Bio-Kleen Black Streak Remover allows you to remove those black streaks from your RV, camper, boat, trailer and more with ease. Just spray on a cloth and wipe clean. A multi-purpose cleaner degreaser designed to remove soils and marks with minimum effort on a wide variety of hard surfaces. Leaves surfaces streak free and sparkling clean. No rinsing needed and residue free. Excellent for a number of household cleaning jobs: cleaning vinyl and aluminum siding, gutters and eaves, engine and garage cleaning and degreasing, cleaning parts, tools and more.