HoltsRadweld 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

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

Works a treat, I've used a few different coolant leak products from different brands one of which I used to use that costs about 5 times the price of this product. Then when my head gasket went and my usual go to brand failed to work I thought I would try this as last resort for the sake of 8 quid. Every morning when I started my campervan there was clouds of smoke pouring from the exhaust and starting to get worse. Anyway I poured this in not really expecting anything to happen went for a drive then come back home and left the engine running with the heaters on for half hour switched the engine off then went in the house and forgot all about it. Anyway next morning went out to pop to the shop started the engine expecting a load of smoke like usual low and behold not a single bit of smoke, 3 months and counting still no sign of the usual smoke or lose of coolant I was having to top coolant level up every 4/5 days before and not a drop since using this. As a side note if your cooling system is pressuring/bubbles in the header tank you cant simply pour and go like it says on the front. It's a bit more of a faff on removing heater plugs or spark plugs 1 by 1 I didn't have this problem but if that's what you're experiencing this is what you will need to do.

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!.

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.

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 !

I purchased this hoping it would fix the leak in my Mk4 golf GTI. I followed the instructions word for word. It seemed to work, but the next morning there was a big puddle where it had drained out overnight. Did not work for me sadly.

Absolutely brilliant. Radiator started to leak about 18 months ago, so put this stuff in ***YOU NEED TO PUT IT IN WHEN THE ENGINE IS COOL***.Ran my trusty Fiesta - driving through a day job and then fast food deliveries at night (you don't hang about either..!) and this stuff kept my radiator sealed tight with not a drip for 18 months. I carry a bottle of this stuff in my boot all the time.Just 2wks ago noticed the heater got a little hot.. popped the bonnet and sure enough, after 18 months and covering probably 30'000mls... the Holts Gold Radweld finally conceded... but only a mild breach, there was no coolant 'pouring' out anywhere.This stuff is quite literally worth it's weight in gold. I now keep 2 in my boot.. (only needed the one for app 30'000mls so not sure why lol).. and i recommend this product in the strongest possible way.

My 2002 Ford Fiesta was leaking coolant like crazy, I would fill it up from way below min up to max and it would be back below min again within a week. Wasn’t overheating but was still worrying. Spoke to my mechanic neighbour who told me about this stuff so thought I’d try it as I’m a student and don’t have the money at the moment for a garage trip. The reviews were sceptical but thought I’d give it a go. I emptied half of the bottle into the coolant tank, then topped up with coolant and then started the car and left it ticking over with the heater on full for 25 mins. That was 2 weeks ago and my coolant hasn’t moved a cm! Very impressed! I realised afterwards that I forgot to shake the bottle before I poured it in but it has still worked like a dream!