HSL Eco Descale is a safe technology cleaner. Formulated to rapidly clean mineral scale from water passages in water cooled or heated equipment. Improves efficiency. Lowers costs. Conserves energy. Extends the useable life of cleaned equipment. Safe on Steel, Iron, Brass, Copper, Plastic, Rubber and other materials found in most water cooled heated or operated equipment. Not suitable for use on Stainless Steel. 5 Litre bottle.