Proven by contractors to be the world's finest. TrucleanEX Deck & Roof Cleaner is designed to clean the dirtiest pine, cedar, redwood, cypress and birch decks and siding; asphalt shingle and cedar shake roofs; and badly stained and oil spotted concrete in the fastest and easiest way possible. TrucleanEX Deck & Roof Cleaner is a concentrate that dilutes 9:1 with water. A quart makes 2 1/2 gallons and a gallon makes 10 gallons. A gallon diluted 9:1 covers about 2000 square feet. TrucleanEX Deck & Roof Cleaner is water-base. Being free of bleach, it will not harm shingles or bleach wood. No scrubbing needed. Features Can be used with a pressure washer Removes 15 years of weathering For use on decks, siding, fencing, docks, cedar and asphalt roofs, gazebos, brick and concrete. Will not harm wood or shingles A gallon diluted 9:1 covers about 2000 square feet. Removes tree stains and scum Removes dirt, grease, baked-on pollen, mildew, algae stains and weathering.Restores original color to pine, cedar, redwood, cypress and birch. Asphalt and cedar shake shingle roofs are made to look new. Cleans and whitens concrete Cleans vinyl siding and fiberglass No scrubbing necessary