TRAC Descaler is a safe, non-toxic, and biodegradable fresh water scale remover. Designed specifically for fresh and brackish water applications, TRAC Descaler can safely be used within engines, cooling towers, boilers, or just about any other systems re-circulating water. TRAC Descaler will not harm gaskets, seals, plastics or any metals commonly found in water systems. Cost Effective: Guaranteed to be 1/4 of the price of traditional mechanical methods while yielding superior results. Fast: While other chemicals are available on the market, most requiring extensive treatment time. TRAC Descaler completes most applications within 5 hours! THE ENVIROMENT FIRST: Like all of TRAC's products, TRAC Descaler is 100% biodegradable, safe and completely non-toxic