Cooling System Stop Leak

Cooling System Stop Leak

W45695 · 1000ml

Stops small leaks in the radiator and cooling system, with anti-corrosive properties.

  • Stops and prevents leakages in the radiator, cooling and heating system.
  • Stops head gasket leaks.
  • Will not harm rubber hoses, gaskets or other system components.
  • Is compatible with all antifreezes and coolants, also with OAT coolants (Organic Acid Technology).
Parts Effectiveness
Cooling System


Engine Petrol & Hybrid petrol, Diesel & Hybrid diesel

For all “water” cooled systems of petrol, diesel and LPG engines when minor leaks are noted. Can also be used as preventive agent.

How to use

  1. Add to the cooling system
  2. Add 3 to 6 %: 0,3 to 0,6 litres product per 10 litres cooling liquid
  3. Use when required

If the cooling system is excessively fouled, it is recommended to clean first with Wynn’s Cooling System Flush. Check coolant level. Start engine, bring to operating temperature with all heater controls in HOT position. Shake the can well and add 3 to 6 % (0,3 to 0,6 litres product per 10 litres cooling liquid) to the cooling system via the radiator filler cap or via the expansion tank in case of a completely closed radiator with through-flow system. Close the system and let the engine run for approx. 5 to 10 min. until the leak or leaks are sealed


Additional Information

Product Code
Units per case
Packaging Languages
1000 ml