Black Streak Remover Is Great For Removing Black Streaks From Rv'S, Boats, Homes, Vinyl Siding, Aluminum, Buses, Trailers, And More! Infused With The Latest Surfactant Science, This Product Dissolves And Lifts The Streak Without Damaging The Surface Behind The Black Streak. This Is A Concentrated Product, Dilute This Product For Best Results.Available In 1 Gallon Only.