Pipe Shield doesn't remove clogs—it actually prevents organic materials such as fats, grease, soaps, and detergents from building up in your drain and causing clogs. It's an easy and economical way to keep clogs from recurring. Just one gallon (128 oz.) provides 64 treatments when used as directed. Powerful Clog Prevention That's Safe for the Environment Pipe Shield is specifically formulated with the environment in mind, that’s why our active ingredient is a natural biological solution that contains no harsh or toxic chemicals. And, Pipe Shield treats the whole plumbing system, not just the sink trap, to keep drains flowing freely, for up to 30 days. Roto-Rooter Pipe Shield has been officially accredited "Green" by EcoLogo. As a certified product, EcoLogo provides assurance that Roto-Rooter Pipe Shield meets stringent environmental standards. NSF has also approved our Pipe Shield product, which means that it is safe to use around food products. How to Use Pipe Shield Apply once a month to kitchen, bathroom, shower, tub and other drains. Add 2 oz. (1/4 cup) of Pipe Shield to 32 oz. (4 cups) of warm water and pour into drain. Let it stand overnight, then flush with hot water for one minute. For problem drains, use Pipe Shield once a week. Download SDS Sheet - English (PDF) Download SDS Sheet - Spanish (PDF)