This product's unique high alkaline composition quickly and easily removes even the most difficult black streaks commonly found on RV's, mobile homes, and trailers. STREAK AWAY rinses free with water leaving the surface clean and bright. It is highly recommended for both painted and vinyl surfaces. It is not recommended for unpainted aluminum. Available in 16oz, 1 quart, 1 gallon and 5 gallon sizes. Made in the USA.