Radiator Stop Leak

Radiator Stop Leak

Seals leaks, pinholes and hairline cracks in radiators
W513 · 375ml

Wynn’s Radiator Stop Leak is a unique blend of non-ferrous fibres and surface active agents which combine to plug hairline cracks and pinholes
associated with cavitation pitting and corrosion.
It will not cause any blockage of the radiator core or cooling matrix, nor will it harm any cooling system components.
Radiator Stop Leak is compatible with all Ethylene Glycol and OAT coolants as well as Aluminium and rubber hose safe.
It is recommended that Wynn’s Radiator Stop Leak is carried in recovery vehicles as an essential emergency repair item.

Parts Effectiveness
Cooling System



How to use

  1. Add to the cooling system
  2. Simply follow the instructions on the TDS


Additional Information

Product Code
Units per case
Packaging Languages
375 ml
EN | PT | FR