🛠️ Seal leaks, stop stress — keep your engine running flawless!
Wynn's Radiator Stop-Leak is a 325ml high-performance sealant designed to quickly fix minor leaks in radiators and head gaskets. Compatible with all coolant types including OAT fluids, it protects hoses and sensors while preventing corrosion and rust. Ideal for petrol, diesel, and LPG engines, it ensures accurate temperature control and prolongs cooling system life.
| Manufacturer | Wynn Oil UK |
| Brand | Wynn's |
| Model | Wynn's 55864, Radiator Stop Leak, 325ml |
| Product Dimensions | 1.8 x 3.38 x 9.22 cm; 370 g |
| Item model number | WY55864 |
| Manufacturer part number | 55864 |
| Item Weight | 370 g |
A**R
Very effective.
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 !
K**D
Does exactly what it says!
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
D**L
Worked for me on water pump
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.
M**Y
Fixed leak.
Fixed leak...so happy.
S**R
Didn’t work in my case
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.
M**H
effective
Did the job v.happy
H**N
This works
I have never done this before a review arrived on time worked first time done 3000 miles since
G**Z
Stopped a water leak in my car
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..
Trustpilot
5 days ago
2 weeks ago
