Protects against winter freezing and summer boil over Prevents pitting caused by cavitation and corrosion of brass, copper, solder, steel, cast iron and aluminum Low silicate Aluminum compatible Available as a 50/50 premix Protects against winter freezing and summer boil over Prevents pitting caused by cavitation and corrosion of brass, copper, solder, steel, cast iron and aluminum Low silicate Aluminum compatible Available as a 50/50 premix