House Wash, 1-GallonKrud Kutter brand concentrated house wash cleans exterior vinyl & aluminum siding as well as painted or stain wood siding or shingles. Also cleans brick, concrete, stucco, masonry, gutters & roofing of all types. Removes dirt, chalking, oxidation, weathered wood, tree sap, bird droppings & tough stains from mildew, mold, algae, fungus & moss. Also works on patio furniture, rvs, autos, boats, & more, mix with water & apply with scrub brush or pump up