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Radiator Stop Leak 325ml

OUR PRICE: £5.50
Stock Status: In Stock
Product Brand: Wynns
Product Code: WY55864
Product Condition: New
You Will Earn 5 points which is the equivalent of £0.05

Wynn's RADIATOR STOP LEAK is a sealing product to stop small leaks in the 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).
  • Is formulated to avoid clogging of radiator waterways and temperature sensors.
  • Enhanced protection against rust and corrosion.


  • Recommended for all "water" cooled systems of petrol, LPG and diesel engines when minor leaks are Noted.
  • Can also be used as preventive agent.


  • Warm up the engine with heater control in HOT position.
  • Shake bottle well and add contents to the cooling system via the expansion tank if part of the system circuit (2 hoses: out and return) or directly into the radiator if a single hose overflow tank is fitted.
  • Top up the system with coolant if required.
  • Run engine for approximately 5 minutes to circulate and stop leaks.
  • Contents treat a cooling system from 5 to 12 litres.
  • If the coolant is dirty, flush system with Wynns Radiator Flush and refill with new coolant before treatment with Radiator Stop Leak.

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