ACT Asphalt Cleaner offers you a superior, cost effective and safe alternative to other products on the market today. This environmentally safe water conversational formula removes oil buildup and stains while strengthens the integrity of the asphalt surface by decomposing the detergents in refined oils that breaks down the asphalt work on proteins also. Simply apply and walk away. ACT Asphalt Cleaner can be used around plants, animals, and humans. 1lbs cover approx.50sqft.and has no shelf life.