Use this product to strip away weathered pigmented stains from exterior wood and prepare underlying surface for recoating. A universal stain remover for all deck stain types, it is formulated to remove oil-base, water-base, and alkyd/acrylic blends. Product features: Professional strength formula, wetting agent, thickener and highest concentration of active ingredient allowable provides maximum stripping power. Safer-to-use than paint strippers - no methylene chloride or caustic chemicals. Fast and efficient - strips 1 or several layers in just 15 minutes. For easiest application, apply with a pump-style sprayer (no aluminum parts) and keep surface wet with product during dwell time. Gallon covers approximately 250 sq. ft.