TruCleanEx Deck & Roof Cleaner is a concentrate that dilutes 9:1 with water and is designed to clean the dirtiest wood decks, siding, asphalt/fiberglass shingles & cedar shake roofs, fiberglass, tile and concrete in the fastest and easiest way possible, It removes dirt, grease, grime, tree stains, pollen, pollution, mildew, algae stains and weathering, It restores original color to wood, Makes roofs look like new and whitens concrete, It can be used with a pressure washer, A quart cut 9:1 with water will wash 500 square feet, This cleaner is water based, Being free of bleach, it will not harm shingles or bleach wood, Do not use on painted surfaces, It will not harm your grass or shrubs, It needs no brushing or scrubbing, SKU: CFI013