Oxevac Dental Evacuation and Suction Cleaner Canister. Oxevac Dental Evacuation and Suction Cleaner - Canister. Easy to use—Mix one scoop with one gallon of hot water. Non-foaming, highly concentrated formula is very economical to use. Environmentally friendly, and safe for all types of vacuum pumps. Great for Cuspidors - Just pour down the drain and reduce build up on the lines. Oxevac continues to work even after the pumps are turned off.