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

This stuff really does do what it says on the can. Like anything from this manufacturer, it’s high quality, dries fairly fast if applied in small quantities. Provided the area is cleaned reasonably well it seals without that awful stickiness of mastic. One tin will seal multiple small leaks. A note of caution, this is a temporary fix and would not be strong enough for any pressurised system for any extended period of time, if at all. Its function is mostly to stop that annoying dripping gutter, or a small crack in a flat roof. It will stop a leaking pipe at a poorly fitted union provided the thread isn’t too badly cracked and the leak isn’t huge or the pressure isn’t too high. It’s superb for its primary function and I’d recommend keeping a tin in the garage.

This product is only ever going to seal the smallest of leaks or cracks, being in liquid form as it comes out of the can, drying to a plasticky finish. But in these cases it seems to be quite effective, if layered as suggested. You need to spray thinly, leave for 15 minutes and then do several times more to build an effective covering. If you're using inside I'd advice the use of a face mask. It has a strong aroma and being an aerosol does fill the air, which is not only bad for the lungs but has a strong pear drop aroma. But overall, if your gap fills the criteria it works well, though I have no idea how long it will last.

Fast delivery and simple to use product. Stopped leak immediately.

Okay product. Does not always do what it needs to... Stop leaks🧐

does what it says on the tin. good product - worked on a damp flat roof - I did dry the area before hand but there was still some damp and water around. So far it has worked well

It works, but I have to say, it was a bit awkward to use. As you're spraying it, it can get all over place, but whilst you don't want to drown the affected area, you don't want to underuse it either, so it's a balancing act that you have to strike. Another thing, the instructions say you need to "dry the effected area thoroughly before applying", etc, but, obviously, if there is a leak that you're using this product to fix, trying to dry it thoroughly is a bit of a challenge lol.

Easy to use when I sealed my drippy gutter

Totally ineffective despite following online advice re cleaning the area first and applying several layers. And it stinks something awful. Definitely not for indoor use under the sink as pictured

Très bon produit, efficace sur petite fuite ancienne toiture en ardoise, la toile certainement percée. Je n y croyais pas trop mais surprise après un gros orage pas une seule goutte dans la bassine. Vraiment satisfaite.

Bon produit, j'ai mis ça sur du shingles, ça à l'air efficace

Habe das Dichtungsspray für eine Undichtigkeit meines Garagenflachdachs genutzt. Nachdem ich den Untergrund ordentlich gereinigt hatte, habe ich das Spray großräumig in Schichten aufgesprüht. Das Dach ist dicht!

It works. I had to apply several coats. Still had a small leak but when I added another coat it stop. I’m using it on a sprinkler zone valve cap.

Blev mkt överraskad på resultatet.. hade litet läckage på inglasad altan och allt försvann efter en gångs behandling. Jag får se hur länge den håller.