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🚗 Seal the deal, skip the garage drama!
Wynn's Radiator Stop-Leak is a 325ml advanced liquid formula designed to quickly seal small leaks in radiators, cooling systems, and head gaskets. It prevents coolant loss and overheating while protecting against corrosion and rust. Safe for all cooling system components including rubber hoses and sensors, it maintains accurate temperature readings without clogging. Compatible with all coolant types including OAT fluids, it works across petrol, diesel, and LPG engines to extend system life and reduce maintenance costs.
| ASIN | B000297UG6 |
| Best Sellers Rank | 3,136 in Automotive ( See Top 100 in Automotive ) 47 in Antifreeze & Coolants |
| Brand | Wynn's |
| Colour | _ |
| Compatible Material | Aluminium, Metal, Plastic |
| Country Of Origin | United Kingdom |
| Customer Reviews | 4.3 out of 5 stars 2,122 Reviews |
| Global Trade Identification Number | 05411693558641 |
| Item Dimensions | 4 x 22 x 83 millimetres |
| Item Form | Liquid |
| Item Type Name | Radiator Stop Leak |
| Item Weight | 0.37 Kilograms |
| Item dimensions L x W x H | 4 x 22 x 83 millimetres |
| Item weight | 0.37 Kilograms |
| Manufacturer | Wynn Oil UK |
| Material | Rubber |
| Style | Compact |
| Style Name | Compact |
| Surface Recommendation | Metals and alloys commonly found in automotive cooling systems (e.g., aluminum, steel) |
| Unit Count | 325.0 millilitre |
| Water Resistance Level | Water Resistant |
| Water resistance level | Water Resistant |
C**P
It really works!!
My car started leaking water from the cooling system, it slowly got worse yet we couldn't work out where it was leaking. I was having to top up my coolant every 2-3 days. Even my local garage said it's going to have to get worse before we can see where it's leaking!! Decided to buy some of this as the reviews were good, poured it in the radiator, drove it around 5 miles, no more leaks!! This has been in my car around 3 or 4 months now and still not had to top up my water. Fantastic stuff, will 100% recommend this product as it's solved my water leak. Obviously for major leaks or split hoses etc this will not be suitable.
Z**.
This works!
I had a really small leak from my coolant system, but enough that I had to top up coolant every other day. I used this and it's cured it amazingly. Really great stuff.
M**T
One of the best
I tried what i thought was the best on (K Seal) which didn't work. then i tried this stuff, miles better, worked a treat. If i need to stop a small leak now this is the stuff i would buy again.
D**.
Does the job
Certainly stopped my water leak
B**R
Low cost temporary repair
Low cost 'temporary' repair of slight water leak. In the long term I purchased a new radiator for piece of mind.
S**N
Dod the job
Didn't think I needed it but I did and worked well
W**A
Great produced, it worked
I bought this to see if it could fix what i suspected was a radiator leak on my Renault Clio. Although I knew it wouldn't be guaranteed, as there could be any number of causes, it was worth a try. The application is simple, pour the bottle into the coolant reservoir, I drove gently for a few miles, expecting the warning light to come on - it didn't. Around 1,000 miles later, still no sign of coolant loss. For me, this worked brilliantly, and saved me a fortune in diagnostic or repair bills had it needed to go the garage. Well recommended if you think its a minor leak in your radiator.
A**R
As described
Unable to use as intended as fluids not low enough...
Trustpilot
5 days ago
3 days ago