Radiator Stop Leak w/ Water Pump Lube

Stops Leaks up to 0.9 mm

Prevents Future Leaks

Will not Clog the Cooling System

Protects the Cooling System


Bar’s Leaks Radiator Stop Leak w/ Water Pump Lube 
Formulated to seal minor leaks up to 0.9mm in the cooling system. Bar’s Leaks works on plastic, aluminum, and metal radiators in heater cores, engine cooling jacket, gaskets (including head gaskets), and freeze plugs. Rhizex particles can reduce cavitation by breaking-up the ultra-low pressure cavities and reduce the internal micro-implosions. Special Buffing agents help keep the cooling system clear and clean. The added Cooling System Lubricant will help quiet noisy water pumps while ultimately increasing the longevity of the cooling system.


  • Stops & prevents internal and external leaks up to 0.9 mm in size

  • Freely recirculates to prevents future leaks

  • Will not clog cooling system

  • Protects the cooling system

  • Contains buffing agents to keep system clean

  • Reduces damage associated with cavitation

  • Prevents & reduces formation of rust, scaling and sludge

  • Slows oxidation and corrosion

  • Quiets noisy water pump

  • Compatible with all antifreeze brands

Product Code: RSW1L
Bottle Sizes: Net Wt. 6 fl.oz. (200 mL) / 12 oz (350 mL)

See: Safety Data Sheet (SDS) / Technical Data Sheets (TDS)