Gunk Ultra Engine Degreasant features the latest technology in cleaning & degreasing and is a powerful water based product. It is suitable for use on engines, engine parts, machine parts, automotive parts, boat engines, bicycles and a wide range of industrial and agricultural applications. The powerful water-based formulation is biodegradable and suitable for all cleaning and degreasing applications. Directions for Use: Shake well before use. Spray or brush on to the area to be cleaned. Leave for 2 minutes allowing Gunk Ultra to penetrate fully. Wipe off with a clean wet cloth or sponge. For heavy deposits, a repeat application may be necessary and using a stiff brush to agitate will assist. Can also be used in a dip tank - place components in a wire basket and soak for 20 minutes, remove components and wipe with a wet cloth or sponge.