urnex dezcal 28g (1 oz.), 5 pack urnex urnex dezcal activated scale remover safe, non-toxic, biodegradable descaler for fast and effective descaling of boilers and heating elements for use with commercial coffee equipment and foodservice steam equipment can also be used to maintain faucets, sprayheads & milk systems. helps remove stubborn hard water deposits, scale, and calcification use dezcal at least once per month for regular maintenance each packet = 1oz of powdered descaler - single use use at least once per month to clean, descale, and protect your coffee or espresso maker!