Ridgid® 5 gal Dark Threading Oil is free from chlorine, halogens, PCBs and other heavy metals that cools thread as well as pipe during operation. It is ideal for stainless steel and black pipe with high performance mineral oil formulated to produce superior quality threads. It is easy to wash that cleans off concrete, clothing and piping with water. Oil reduces thread torque and is biodegradable. It is used has dark oil and nuclear oil with low odor and anti-mist formulation. Thread quality can be improved to increase the metal removal operation. It is characterized by a viscosity that works under -20 deg Fand increases the life up to 60%.