Designed to protect drinking water system plumbing down to -50 F Simply dilute concentrate with water and use it as you would any other antifreeze. 36 ounces of concentrate makes 1 gallon of antifreeze. Safe. Odorless.Tasteless. This glycol- based antifreeze is formulated to protect down to the labeled burst temperature even though some slush or semi- solid formation is normal. Non- toxic. Safe for copper, brass and all types of plastic (except acetate).