Alpha-Cool Coolant -37 BLAU, is a premium, READY TO USE Long Life Coolant (frost protection -37 °C) for which a patented, nitrite-, amine- and phosphate-free technology with very powerful corrosion inhibitors has been used. With this technology. Alpha-Cool Coolant -37 BLAU provides longer lasting protection against corrosion than standard Coolant, so that vulnerable parts such as radiators, water pumps and seals will have a longer service life. Special additives prevent sludge and deposits forming in the radiator, ensuring optimal cooling, even in the long term. Alpha-Cool Coolant -37 BLAU is specifically designed for use in engines/radiators made from light metals such as aluminum, magnesium or their alloys.