STP Heavy-Duty Conventional Pre-Charge Antifreeze/Coolant Ready-To-Use is formulated to protect against winter freezing and summer boil over.
- Prevents pitting caused by cavitation and corrosion of brass, copper, solder, steel, cast iron and aluminum
- No initial SCA pre-charge required
- Phosphate-free, low-silicate formula
- Compatible with most major brands of conventional coolants, with and without the addition of SCAs