The product is safe to use in all cars, cooling systems, and alongside any brand of coolant/antifreeze. Holts Wondarweld is a professional cooling system repair product that’s designed to fix small cracks and holes in the cylinder head, engine block and head gasket. Make sure the car is cool before you unscrew the cap and top up with coolant antifreeze following the instructions in the vehicle owner's manual. To provide an exact answer, Holts Radweld is designed to fix holes with a diameter of 30 thousands of an inch (or 0. You don’t need any special preparation to use Radweld and there’s no need to drain or flush the cooling system.

Holts HREP0101A SEALIT Coolant Leak Repair, 250ml Holts HREP0101A SEALIT Coolant Leak Repair, 250ml

Radweld has been carefully formulated to mix with all engine coolant and antifreeze types, and works quickly to fill small holes and gaps, resealing the system to permanently repair leaks.

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National Tyre Service Ltd t/a National Tyre and Autocare is not authorised or regulated by the Financial Conduct Authority. The sealer is suitable for all cars and all engines, and permanently seals leaking engine blocks, cylinder heads, head gaskets, freeze plugs, radiators and hoses. Radweld then works its way through the system to target radiator leaks without damaging or clogging the system. So, without getting deep into the chemistry, think of the actives as a mixture of a sticky material combined with a number of different particulate materials.

repair | Holts Wondarweld Professional cooling system repair | Holts

Run your car’s engine for 15-25 minutes with the heater on and check to see that the leaking has stopped. Once added to the engine, Wondarweld circulates through the cooling system, seeking out small holes, cracks, and leaks to form a permanent repair. uk/" target="_blank" class="b-button__primary d-block mb-10 h-100 d-flex align-items-center justify-content-center">