Holts Radweld in Use

Where do I add Radweld to my car?

Add Radweld directly into the expansion tank. 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.

Car head gasket Bruce Ellis and Rich

Where do I add Wondarweld to my car?

You pour Wondarweld into the cylinder head outlet. Never pour Wondarweld into oil. Before using Wondarweld, there are important steps that you should take. You need to empty and flush the entire cooling system with plenty of water. Then remove the top hose from the cylinder head outlet and the thermostat. Replace these after you’ve added Wondarweld.