JENOLITE Stop Leak Sealer Spray | WHITE | 400ml | Leak Sealer for Gutters and Flat Roofs | Waterproof Gutter Sealant | Fills, Seals & Stops Leaks | Long Lasting Waterproof Sealant

🛠️ I received the 400ml Jenolite Stop Leak Sealer Spray in clear, intended for sealing leaks on surfaces such as gutters, flat roofs, sheds, and drainpipes. It adheres to materials including plastic, UPVC, roofing felt, tile, concrete, and metal. I used it to seal a slight leak at a caravan gutter. The spray came out quite runny at first, which suited my purpose as it allowed the substance to penetrate into the small gap. I was satisfied with how it applied—layering it gradually gave good control—and once dry, it formed a plastic-like coating that seems very durable. So far, the leak has been stopped, though it remains to be seen how well it holds through winter. There is still plenty left in the can for another use. After application, I inverted the can and gave it a quick spray to clear the nozzle before storing it. I am very satisfied with both the product performance and the value for money. ✔️

Very useful product handy to have when little problems happen.

The JENOLITE Stop Leak Sealer Spray is a great solution if you have irritating leaks in your gutters, roofs or other surfaces. Honestly, I was sceptical. We have had a 15mm Perspex joined roof leaky on and off for the last two years and I just did not want to replace it with so much other DIY going on.All my other fixes, tape, sealant, more edging, larger flashing, worked for a while, but started leaking again within three to four months. Then I used this spray over a year ago and it has not leaked since. I was so impressed that I even bought some to help my mother-in-law with a similar issue.You MUST properly prepare the area—I mean really prepare it. I learnt this the hard way. The first time, I just wiped it down and sprayed it and within four weeks, it started peeling and looked like fish scales! If you take an extra 20 minutes to ensure that the surface is clean and completely free of oil and dirt, this stuff works.The spray dries quickly. Just shake it up and apply in small, thin layers; do not try to empty the can in five minutes. Let each coat dry properly. Unlike some other sealers, it creates a semi-flexible, watertight seal that will not crack over time. However, I am not sure how well it would perform in areas with a higher movement.I have used this on metal, concrete and plastic. A week after application, we had significant rain—no leaks, no peeling… nothing. It is also UV-resistant, so I am not worried about it breaking down in the sun. When I inspected the area about 12 months later, while doing other work, it was still in good shape. I suspect this is because the spray seeps deeper into the gaps compared to tape and general sealant.This is a solid leak fix. I originally thought it would be just a small-scale temporary solution, but it has lasted more than 12 months and gave me time to focus on other house projects. It saves money on repairs, is durable and is easy to use. If you have leaks, grab a can and try it; you might save yourself hours of frustration!

I was probably stretching the use case a little for this, but I was using it to attempt a pinhole leak on a car firewall. It certainly stayed dry for a while after use through North Wales rainfall, but then leaked the instant I took it through an automatic car wash (water draining through the scuttle grille at the top of the bonnet). Having said that, it's been mostly dry since, to the point where I reinstalled sound-deadening foams and carpet this summer. In hindsight, I probably would've been better getting a tin of the paint-on stuff as this is quite thin and tends to run on application. Subsequent layers seemed to 'stick' a bit better but again, I really don't know to be honest.

Easy to use, looks like runny black liquid rubber,drys quickly, good finish, used on leaking guttering and has seemed to work, time will tell

First line of directions states area must be dry and clean. I’m yet to experience. Dry leak so this does not do as it says on the tin

Used to seal a leak from pipe coming thro conservatory roof sealed it whilst still dripping because rain never stopped long enough to dry out. Tube said it could be used under water not sure about that but after several applications it has appeared to stop the leak but not had any serious rain since so withholding my final judgment on if it has worked or not.

Fantastic product. I switched teh spray nozzle for one with a straw as I was using it to seal an area behind a skirting board. It has worked fantastically!