4oz Silicone lubricant. The concept for this high-tech formula was improvised by the Marines, during Operation Desert Storm, who lubed up with actual miltary issue CLP (cleans, lubricates, protects) in the sands of the Kuwaut battlefields. Gun Oil Silicone Lubricant combines Dimethicone, the highest medical grade silicone, with Vitamin E and Aloe Vera. This unique hypoallegenic formula provides a long-lasting glide while protecting and moisturing the skin. Gun Oil contains no oil making it perfectly safe for use.