High-Tech Lube For Smooth Rapid-Fire, Condom-Safe Action. Gun Oil H2O 4oz water-based lubricant is formulated to the same high quality specifications as Gun Oil silicone-based lube. This condom-safe lube is highly concentrated and easy to wash off. Gun Oil H2O is hypoallergenic and contains no pigment, so it does not stain fabrics. Fortified with Aloe Vera and Vitamin E, Gun Oil H2O is gentle on your skin.