DEI Heater Hotter Radiator Additive, 16 oz

DEI Heater Hotter is a radiator additive formulated to accelerate the transfer of heat from your engine to the antifreeze, helping your vehicle's HVAC system deliver warm air faster in cold and sub-zero temperatures. For RV and motorhome travelers, that means quicker cabin comfort and faster window defrosting on chilly mornings.

It's compatible with all antifreeze types and aluminum radiators, and it won't dissipate over time. Simply pour it directly into the radiator and let it cycle and mix with your existing antifreeze. Made in the USA.