Coolant SP 13 is a premium, ready-to-use, Long Life coolant with frost protection down to -36 °C, which contains the patented LOBRID additive technology based on 'Organic Acid Technology' and a small percentage of silicate. It has been specifically designed for use in engines/radiators made from light metals such as aluminium, magnesium or their alloys and complies with VW specification TL VW 774J (G13). Thanks to the addition of powerful corrosion inhibitors, the product is practically unaffected by ageing. Corrosion inhibitors also prevent sludge and deposits forming in the radiator, thereby also ensuring optimal cooling in the long term.