GF’s Exterior 450 Stains are low VOC premium quality, exterior pigmented water-based wood stains designed for outdoor projects with vertical surfaces such as garage doors, entrance doors and furniture. Exterior 450 is now made with more than 50% renewable resources formulated from sustainable materials that decrease the carbon footprint. These stains are not recommended for large horizontal surfaces such as a deck. Exterior 450 Stains contain U.V. absorbers to protect the finish and mildewcides to slow mold and mildew growth, but will not prevent the wood from changing color in sunlight. Brush or spray.