You are here: Home>Impeller Material And Usage>Use Neoprene Impellers For Engine Cooling Use Neoprene Impellers for engine c... Use Neoprene Impellers for engine cooling Use Neoprene Impellers for engine cooling, and for fresh or salt water transfer duties. Neoprene is the most commonly used material and is suitable for use where only small amounts of oil or diesel fuel are present. Previous: Use Nitrile Impellers for bilg