The Birchwood Casey Renewalube Firearm Grease is a biodegradable and environmentally friendly product that reduces friction between metal parts better than conventional greases. Renewalube gun grease is great way to give firearms long-lasting rust protection, providing lubrication that sticks to metal without the risk of it evaporating. This is also a great product for long-term gun storage. Non-toxic, USDA Certified Biobased Product. .5 oz. Manufacturer model #: 45115 Biodegradable and environmentally friendly Long-lasting rust protection Reduces friction