Radiator Stop Leak
Cooling System
Stops small radiator and cooling system leaks by depositing sealant material and conditioning at leak points.
Radiator Stop Leak is poured into the cooling system to address minor leaks from the radiator, heater core, or small cracks in hoses. It contains particles and conditioners that circulate with coolant and accumulate at leak sites to seal them. This product is intended for small weeping leaks only and is not a replacement for radiator repair or replacement.
⚠️ Owners Often Notice
If the Radiator Stop Leak is starting to fail, these are the signs owners most commonly report before it gets worse:
Small coolant leaks under vehicle
Coolant level dropping slowly
Sweet smell from engine bay
Puddles or stains under radiator
Related Services
Services commonly performed on or around this part.
Add Radiator Stop Leak
No standard interval on file