NO LEAK 20401 Engine Oil Stop Leak

Completely stopped my old car from dropping oil. Takes the 300 km to do this so users must be patient. It does not work immediately!

It didn't stop the leak from my engine, I waited for over a month of usage to get into the gaskets, but it was no good for me, so I used something else and that works just fine. No more leaks

Had a leaking Oil Cooler and Leaking Rocker Box.Used this sealant and drove a couple of hundred miles and so far no more signs of leaks.

Had a crankshaft oil seal leak on my X5 ,tried this product following the makers instructions and the oil seal is still leaking.So I wouldn’t recommend using this product.

Worked for about a month leak come back eventually

Absolutely fantastic product, we had a leak somewhere in our engine which was dripping on to the exhaust and smoking when we were driving but without stripping the engine down our mechanic couldn't find the leak, gave this a try because if it didn't work it was only a few pounds. It has worked and mended the leak that would of otherwise cost us hundreds of pounds to have the engine stripped down. Amazing product.

Seems to be working, have now done around 500miles since my oil change and my level of oil is being maintained. If it hasnt fixed the problem completely its definately bought me some time to get some money together for a fix. The only issue is there is no measurements on the bottle and the only information you are given is one bottle treats up to ... litres of oil. I ended up working it out and using scales to get the right amount i needed. I appriciate some people would just use the whole bottle and i dont knock it but for me its lacking in accuracy unless you do what i did.

The leak at the rear seal has almost stopped in such a short time.