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I have used this and Holt's Radweld Plus with great success for many years. I have found this is superior to products that cost 3 times as much and is very easy to use. Just make sure you add it (with care due to hot liquids) when the engine is warmed up and circulating , so it goes straight into the system and isn't left in a non moving coolant bottle for ages. This product is so good it can even seal small leaks in the head gasket which is a very difficult and expensive or repair to undertake if one chooses to replace the head gasket.Try this cure first.
Verified purchase: Yes | Condition: New
This seems to have fixed a leaking core plug. It does exactly what it says it does mg t type Dave
Verified purchase: Yes | Condition: New
Coolant level sensor light kept coming on, so my car required topping up with coolant and water on a weekly basis, added this to the system following the instructions, after a month the system hasnt lost any coolant. Basically it works!
Verified purchase: Yes | Condition: New
It's a well known product but yeah, it's pretty darn good! Been having to refill my cooling system daily for a couple of weeks. Filled it with coolant and half a bottle of this stuff, did the running it thing. Haven't had to put any more coolant in since!
Verified purchase: Yes | Condition: New
Replenished my stock, as used as a last resort to cure problem issues, as it is one of the only products that does really work, so always have some on the shelf.
Verified purchase: Yes | Condition: New
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