Wynn's Radiator Stop-Leak - Seals Radiator & Head Gasket Leaks - Prevents Corrosion & Rust - Compatible with All Coolants/Antifreeze & OAT Fluids - Safe for Hoses & Sensors - 325ml

Easy to use sorted small leak I discovered the day before a driving holiday to Europe. Put it in two years ago, still no leaks . Great !

Worked.. After trying everything to fix my coolant leak a pint a week I was losing. Iv changed the cap had it looked at by 2 garages and it was driving me mad. Tried this and it has stopped it first time. Poured it in and drove for 25 minutes. Leftbitvover night and all fixed. Brilliant product.

I was losing around a litre a week of coolant via the water pump. I literally just poured this in, idled the engine for 10 mins and then left the car turned off overnight. That was 3 weeks ago and since then I haven't had to top it up once. I'm always scepticle with these additive solutions but certainly for me in this instance it worked with the kind of leak I had. The advantage unlike k-seal is it doesn't leave shiny metal flakes in the coolant reservoir, it's just a milky fluid.

Fixed leak...so happy.

I tried this to fix what looked like a small leak in the coolant hoses system, it didn’t work in my case but didn’t cause any issues to my car.

My car was needing antifreeze top up at least once a week but when I used this, it has stopped leaking. This is my second week and I still haven’t topped up! Good product and good price too

My car coolant leaking don't know where coolant goes and because that car getting overheate. Advised gasket problem or not repairable.Then i found this on amazon and purchase problem solves not a single drop coolant level goes down .car run normal.

I was quoted £450 to repair a water leak, it was just running out and emptying out of the system.I tried this and worked first time! Massive saving, time will tell how long it holds for..