COOLANOL is a premixed ready-to-use 50/50 blend of premium quality ethylene glycol based antifreeze and deionized water to provide optimum cooling, water pump lubrication and rust & corrosion protection for all aluminum and magnesium motorcycle, ATV and side-by-side liquid cooled engines. Coolanol also contains anti-foam agents to reduce water pump cavitation and increase cooling capacity. Coolanol 50/50 blend protects from freeze-ups in winter down to -34?F(-37?C). Coolanol also raises your cooling systems boiling point to 265?F(129?C) with a 15 lb. radiator cap.