Waterproof Patch & Seal Tape Black 3m

Super sticky and strong, great tape from a great brand. My experience of buying and using Gorilla products is most satisfactory and the go to brand for getting to job done.

Bought to reattach a washer blade that had come loose while I arrange for a new washer. It doesn’t stick for ever as it’s not exactly what it’s intended for HOWEVER. A couple of strips across the blade and one along the side for extra security and I can get my washing done as normal for a couple of months before I need to replace the tape. It’s definitely waterproof and super easy to use and considering what I’m using it for actually works really well. I got several uses out of the roll before I needed to look at getting another one. I’ve also used it to patch up a hole in the sink at work and that is still holding strong many months later despite the sink getting heavy retail kitchen use multiple times per day. I will say the extreme temperature thing is a bit misleading. Anything over 40 degrees seems to soften the sealant and make it come loose easier. But for cooler temperatures it’s brilliant.

Great stuff, will stick to most things. I used it to repair a crack in my garage roof which is corrugated asbestos sheets - it didn’t stick to to that but with use of Gorilla Glue it bonded well.

I used Gorilla Waterproof Patch & Seal Tape (3 m, black) to patch a crack in my old concrete shed roof after the felt started coming off. I’m really impressed — it’s 100% waterproof, and once applied properly (cleaned the surface, pressed firmly), it’s held up through really heavy rain. The rubberised backing flexes nicely, so it conforms even to an uneven surface. What’s more, the adhesive is very strong yet durable; it’s stayed put without peeling or lifting at the edges. It’s a solid, reliable fix until I’m ready to re-felt the roof properly.

Brilliant stuff, did the trick. Very sticky 👍

Excellent stickiness ,strong and easy to work with, be aware though 3m does not go a long way.

Let me begin by saying this review is marked three stars not because the product is bad—far from it. In fact, the waterproof tape in question is thoughtfully packaged, appears well-manufactured, and holds great promise for a variety of sealing tasks. Unfortunately, it simply didn’t perform as I needed in one very specific scenario, which ultimately defined my experience. I purchased this waterproof tape with one main use case in mind: to patch an underwater leak. My expectations were high, especially after seeing the claims made by the product description and a handful of positive reviews. I was hoping to stick it onto a submerged surface directly, expecting it to adhere firmly and stay in place, even under water pressure. However, that ideal scenario never came to pass. No matter how carefully I attempted to apply the tape—both submerged and then with the surface pre-treated and dried—it simply would not bond effectively. Let me explain exactly what I tried. The first method was applying the tape directly under water. The material had a smooth, rubberised feel, flexible enough to conform to surfaces, but while it clung to itself decently, it wouldn't bond to the plastic or vinyl pond liner I was attempting to patch. No matter how much pressure I applied or how carefully I smoothed out the tape, it began lifting within minutes. Thinking I had perhaps misapplied it or the temperature played a role, I removed the section, dried the area thoroughly, and applied the tape again. Then I slowly reintroduced water to the site. At first, it seemed to hold better, but within a day, signs of failure reappeared. It’s entirely possible that I received a bad roll—that is, a defective batch where the adhesive layer had degraded. Reading other reviews, I noticed that many users shared a similar sentiment. Complaints ranged from the tape not being sticky at all to reports that even heat treatment (using a hairdryer or heat gun) made no difference in adhesion. Others stated that even in dry conditions, the tape peeled off smooth surfaces like PVC or metal. And yet, some users report excellent results on roof tiles, plastic covers, and outdoor pipes. So which is it? This duality points to either quality control issues or a product that is extremely sensitive to surface conditions. On dry surfaces, the tape did have a better hold. I tested it on a painted wooden board and a rough brick wall, and it clung well for several days, even through light rain exposure. The material appears durable: thick enough to feel secure, slightly stretchable, and easy to cut with scissors. But for my original use—wet application or underwater sealing—it simply wasn't up to task. From a materials standpoint, the tape is made from a heavy-duty, rubber-like compound with a plastic backing you peel away to expose the adhesive. The adhesive has a tacky consistency, not wet or oily, but not as sticky as duct tape. When pressed onto a clean, porous surface like unfinished wood, it grabs decently well. On smooth, glossy, or curved surfaces, its bond becomes noticeably weaker unless supported by external pressure like clamps. The real issue, however, lies in its marketing. If this tape had been advertised primarily for dry applications with incidental water exposure, I would likely be writing a very different review. But the strong implication that it can be used in ponds, on boats, or even submerged conditions, sets expectations unrealistically high. It creates a disconnect between what the tape actually does well and what people think it will do based on the label. That said, this tape has potential. For emergency patches on dry roofs, window frames, garden hoses, or outdoor equipment, it could be incredibly useful—if applied correctly. The key is preparation. The surface must be clean, free from oil, completely dry, and ideally, slightly textured. Applying pressure across the full surface area and allowing it to set for several hours improves results dramatically. In cold weather, warming the tape with a heat gun before application (not after) seems to help activate the adhesive too. I would suggest keeping a roll in your DIY kit for quick fixes around the house or garden, especially for materials that don’t regularly come in contact with running water. It’s particularly good at binding its own edges—so for wrapping, binding, or encasing something like a cracked pole or hose, it functions very well. But for high-stakes waterproofing—like sealing a leaky pond, tap, or submerged pipe—you’ll need to look at proper underwater epoxies or specialist marine sealants. In conclusion, this is a three-star product because it does serve a purpose, and it does it well—but only under very specific, well-prepared conditions. It is not the miracle waterproof tape it may appear to be. If you understand its limitations and apply it where it excels, you'll likely be pleased. Just don’t expect it to stick underwater out of the box, and don’t plan your entire repair around it without a contingency. For light-duty, water-resistant household fixes? Absolutely. For full waterproof performance under wet application? Not quite. Use with caution, and always test first.

For me this is some of the most reliable & good quality waterproof tape you can get. I’ve used it for a variety of different jobs outside & it doesn’t tend to ever start to peel off after a few months like your average duck tape etc, very water resistant too, great product!

It works very well and of great quality. I will be buying again

Breed, hecht zeer goed en elastisch. Ik heb hiermee de ring van de trampoline geplakt, dus het krijgt heel wat te verduren. Zit er nog steeds strak op, dus ik ben meer dan tevreden.

Met pijl een gat geschoten in ons Intex zwembad. Dankzij tape geen lek meer.

Bästa tejpen för ordentlig utomhusbruk eller tätning 👍

Does not perform when pressure from water penetrates. Tried on hair cracks on water butt