Steel Seal Blown Cylinder Head Gasket Fix Repair Sealer (Lifetime Guarantee) Award Winning

This stuff actually works really good. I will say follow the instructions carefully and it does say only works with blue antifreeze. When I use it I spend a bit of time flushing the system before pouring it in and I've not had any problems with radiator/heater getting blocked. So far used it in renault clio, SCv8 range rover, VW golf, Mitsubishi 3000. It worked on them all. The range rover was the biggest challenge as it was bad, emptying the coolant in about 30min of driving. Seems to last as a permanent fix golf and Mitsubishi have been running for a good few years and still good. Range rover ran 2 years before succumbing to other issues but gasket was still good. I was dubious about using it on forced induction engines due to higher pressures but it works no problem. Dont know how well it would work on a diesel engine but for the price of it it's worth a try.

So I was having exhaust gases coming into the coolant causing bubbling and pushing coolant out my overflow on my subaru impreza 1998, wasn't really expected it to do anything but followed the bottle and went it for a good drive after and had zero bubbles and no coolant had been pushed out, I did check the pipe to the overflow to see if it had clogged it up but nope it was all clear so this product 100% fixed my issues and after 250 miles its still going strong. Let's just see how long it lasts

Didn't work as it said. Waste of £28. Followed all the instructions but looks like didn't stop leak. Bottle I received and picture showing in Amazon is also different. Pay some extra money and get it from halford or euro car parts.

I used this in my Audi A4 B6 1.8T 190 Quattro after it had developed a slight blow in the head gasket. After a week of white smoky start-ups I decided to try this before opting to shell out the thousands of pounds to replace the head gasket and to my amazement it has solved the problem!!!!! The car was perfect again and I sold it 3 weeks later for 50% more than what I paid for it in April 2020! 👍 No way that would of happened if I had not use this miracle product!

Sorry to sat that after using this product my water pump went and it left bits in the systemI can't recommend this product due to the problem after using it

Ive put this in my corsa as im loosing too much water through a cylinder and i reckon its helped atleast partially anyway. Car does seem to run a bit better but time will tell if its something i would try again... Update... Car never lost water again and ran everyday for several months till i scrapped it due to rot. Drove to scrapyard as normal. Would recommend

Great product I was thinking it wouldn’t work at first, granted I bought one did what it said on the bottle bought another did what it said on the bottle as mine was a bigger engine so needed more of it! But it lasted me a few mo the just enough to put some money aside for the repair bill Buy with confidence

Before pouring this product into my cooling system, I tried a simple test, having previously read about gel forming inside the cooling system. I extracted some of my coolant into the jar shown, added a small amount of the product and then I heated it up in a saucepan of water.A translucent skin started forming on the surface at about 60 deg C and by the time it got to 80 deg C, it looked like what you see in the pictures. The gel still remains after letting it cool.If I had poured this into my cooling system, I would now have BIG problems! It might have sealed the tiny cylinder head gasket leak that I have, but at the very least, it would have blocked the heater core and at worst, it would have blocked some or all of the coolant jacket.The approved coolant for my car is OAT (Organic Acid Technology) antifreeze conforming to the WSS M97B44-D standard -- in other words, long life coolant. Reading the small print on the bottle of the product, it is evident that the product is NOT compatible with OAT antifreeze. As far as I can make out, it is only compatible with ethylene glycol antifreeze, which in turn is not compatible with the engine in my car.I have sent an email to the manufacturer explaining all this and asking for advice, however my gut feeling is that to use this product safely in my car engine, I would need to drain and flush the system thoroughly with plain water, then add the product with plain water, run the engine until it had done its job, then drain, flush and refill again and fill with the correct antifreeze.On the basis of that, I am considering using an alternative product that is compatible with OAT antifreeze (although I will test it in the same way first before pouring it in).I've given it two stars, because it might very well do the job that it claims to do, however you do need to be 100% sure that it is compatible with your coolant before pouring it in. The test that I describe is simple, only takes about 20 mins and might save you a load of hassle.