Wynn'sRadiator 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 !

Works perfectly, my daughter had a small leak in her radiator and I put this in and it's been perfect ever since. No issues at all and saved us a fortune at the garage! Highly recommend

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.

Did the job v.happy

I have never done this before a review arrived on time worked first time done 3000 miles since

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..