Qualkem Box of 4 x 5 Litre Wet Heating Antifreeze. for all wet heating systems in Motorhomes, Caravans & Boats. 5 Year Corrosion protection. G13 specification, exceeds BS6580:2010 Conforms with leading manufacturers specifications. Frost protection to -27 degrees centigrade. Please Note: CHEMICALS ARE DISPATCHED DIRECT FROM MANUFACTURER AND INVOICED SEPERATELY BY PLS. ORDERS ARE PLACED BY PLS ON TUESDAYS AND THURSDAYS EACH WEEK FOR DELIVERY WEDNESDAY AND FRIDAY DIRECT FROM MANUFACTURER.