Spray Nine - Grez-Off. Grez-Off's award winning, grease busting power does the dirty work! This professional strength, biodegradable formula hits hard and fast with powerful water-soluble solvents. Bolstered with fast acting surfactants, Grez-Off digs into grease and grime, prying it away like no other product can! USDA approved and VOC compliant in all 50 states.. Features:. Size - 1 Gallon. Powerful formula quickly removes heavy-duty automotive soils, grease and dirt. Safe to use, non-flammable, biodegradable and VOC compliant. No fumes or unpleasant odors. Ready-to-use, no mixing required. Powerful water-based formula. Use on:. Engines, machinery, tools, mowers, conveyors, vents, work benches, walls & floors, ovens, grills, trunks, trailers, RV's, industrial and farm equipment, concrete, asphalt, vinyl, rubber, plastic, metal and more