Radiator Stop Leak 325ml

Product code: WYN55864

31 in stock

GBP new

£6.99

£5.83 ex. VAT

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Wynns Radiator Stop Leak is a specialized cooling system treatment designed to seal small leaks in radiators, heater cores, water pumps, and cooling system gaskets. This effective 325ml formula contains a unique blend of sealing agents and conditioners that locate and plug minor leaks while conditioning the cooling system to prevent future leakage. The non-clogging formula works effectively without harming the cooling system or restricting coolant flow, providing a convenient solution for addressing small coolant leaks without requiring mechanical repairs.

Key Features

• Active Leak Sealing: Quickly seals small leaks in radiators and heater cores
• Gasket Conditioning: Rejuvenates and seals leaking gaskets and O-rings
• Water Pump Protection: Seals weeping water pump seals
• Non-Clogging Formula: Won't block narrow passages or affect thermostat function
• Preventative Protection: Helps prevent future leaks when used as maintenance
• Compatible with All Coolants: Works with all types of antifreeze and cooling systems
• Metal Conditioning: Helps seal porous metal in older radiators
• Long-Lasting Effect: Remains active in the system for extended protection
• Easy Application: Simply adds to cooling system
• Cost-Effective Solution: Fraction of the cost of component replacement

How to Use

Ensure the engine is cool before opening the cooling system. Shake bottle well and add entire contents to the radiator or coolant reservoir. Top up with coolant if necessary to ensure proper level. Run the engine at normal operating temperature with the heater set to maximum for 10-15 minutes to allow the product to circulate throughout the system. For preventative maintenance, add to the cooling system every 12 months. For active leaks, results should be visible within 200 miles of driving.

Radiator Stop Leak is particularly valuable for addressing minor coolant leaks in older vehicles or as an emergency repair until proper mechanical service can be performed. This product is ideal for sealing small pinhole leaks, weeping connections, and minor gasket leaks without requiring system disassembly. Not intended for repair of severe damage or large cracks. For comprehensive cooling system maintenance, consider using Wynns Cooling System Flush before adding this product to ensure optimal performance. Compatible with all types of coolant including traditional green antifreeze, extended-life formulas, and OAT (Organic Acid Technology) coolants.

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