Holts Radweld Plus Coolant Leak Repair, Total Coolant Leak Repair, Industry Leading Car Radiator Leak Sealant, Easy To Use, Seal Engine Block, Cylinder Head, Hoses & More, Suitable For All Cars, 250ml

It seems to work wonders! I've waited a month to see if it actually holds and I have to say I am very pleased. My car developed a serious coolant leak where a metal pipe bursted and everything leaked out within minutes. After fixing this, what I thought was the only leak, the coolant kept slowly disappearing still. I bought this, hoping to avoid visit to the garage after reading the reviews and doing a little research. Extremely easy to use, just pour into the coolant tank and leave the car running for 30 minutes. Month later, coolant still at the same level!! Fantastic, easy to use and and absolute bargain too...

I had a small leak on the bottom right hand side of my bmw was not sure if it was a hose or the radiator only leaked after the engine was cooling down not when hot research on product and similar read good and bad reviews but for the cost I went for it sealed the leak in 10/15 mins and has not come back non of the rubbish written about clogging etc it is a permanent fix and no issues with any other part of the system heating is still the same and aircon still cold a fantastic product so in my opinion it is a great buy

Had a pin hole leak in my overflow tank so thought I would give this a try before replacing it.Followed the instructions on the back ( used half the bottle ) and let the car get to temp for 30 mins.Set off to work (20 miles) and no leak!TBH even with all the good reviews I still had my suspicions, but 1month later it’s still doing brill!.Only reason for 4 stars is how well it’s works long term.Will update!.

This is amazing stuff. The inlet on the car radiator had problems. Water leaking a lot. Had it replaced, but still had the odd leak. Put the Radweld in and hey presto just like magic, the water leak was fixed. Highly recommend.

Had leaking coolant from somewhere but couldn't find without dismantling the mud shield etc, tried this and it has worked to stop any further loss of coolant. Followed instructions and am very pleased, would I recommend it ? Most definitely !

No idea if it worked or not, but apparently these products leave stuff in the system that'll annoy owners for years to come, so if that appeals to you go buy some

Stopped an annoying leak straight away , fab .So simple to use , good value fast service

Well it’s stopped a very consistent leak from my head gasket seal. Not drove the car yet to see how things go. But for now the dripping has stopped. My fingers are crossed. Months later and things are still going well. The leak has not returned