Cafetto Renew Descaler is designed for espresso machines, boilers and coffee brewers. Cafetto Renew Descaler can also be used in kettles, urns and bain maries. 4 x 25g Sachet Pack Each 25g Cafetto Renew Descaler sachet makes up 1L of descaling solution. Cafetto Renew Descaler is a organic descaler suitable for espresso machines, boilers, coffee equipment. Can be used in kettles, urns and bain maries. This new and improved formulation from Cafetto's Restore Descaler contains a synergistic blend of organic acids that give outstanding scale removal. Safe for all machine parts. leave no harmful residues and do not cause corrosion within the coffee machine. Safe to use on aluminium, brass and stainless steel.