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🔧 Seal it like a pro, rain or shine!
Permatex 81158 Black Silicone Adhesive Sealant is a high-performance, sensor-safe RTV sealant designed for indoor and outdoor use. It bonds and seals a wide variety of materials including glass, metal, plastics, and vinyl, offering waterproof, weather-resistant, and vibration-proof protection. With a broad temperature tolerance from -75°F to 450°F and a full cure time of 24 hours, it’s the go-to solution for durable repairs and secure seals in professional and DIY projects alike.


| ASIN | B000AL6WLA |
| Best Sellers Rank | 31,275 in DIY & Tools ( See Top 100 in DIY & Tools ) 526 in Sealers |
| Brand | Permatex |
| Colour | Black |
| Compatible Material | Glass |
| Country Of Origin | USA |
| Customer Reviews | 4.5 out of 5 stars 11,830 Reviews |
| Global Trade Identification Number | 00686226811585 |
| Included Components | Auto part, Automotive Accessories, Replacement and Performance parts |
| Item Dimensions | 20.3 x 10.2 x 5.1 centimetres |
| Item Form | Liquid |
| Item Type Name | Silicone Adhesive Sealant |
| Item Weight | 91 g |
| Item dimensions L x W x H | 20.3 x 10.2 x 5.1 centimetres |
| Item weight | 91 g |
| Manufacturer | Permatex |
| Manufacturer Part Number | 81158 |
| Material | Silicone |
| Model Number | 81158 |
| Number of Items | 1 |
| Product Warranty | Manufacturer Warranty |
| Style | 3 oz. |
| Style Name | 3 oz. |
| Surface Recommendation | Fabric |
| UPC | 686226811585 |
| Unit Count | 85.0 gram |
| Water Resistance Level | Waterproof |
| Water resistance level | Waterproof |
E**S
Buy Again
great stuff, even worked well in the rain
M**L
Solid sealant - saved my aftermarket brake lights🤷🏼
I used this to seal around a set of aftermarket rear brake lights after my original ones let water in and ended up getting damaged. Applied a clean bead around the edges and let it cure for the full 24 hours. The day after, we had heavy rain and so far it's holding up great - no leaks and the seal feels strong. It used just over half the tube for both lights, so if you're planning a bigger job or sealing more than one area, I'd definitely recommend picking up two tubes just in case. Will update if anything changes, but so far this stuff is doing exactly what I needed.
F**S
Adhesive
Good adhesive
S**N
Worked great
I fixed my FitBit's screen with it. The screen fell out, but after the application, it became water resistant again, so it did the job well.
M**R
Did the job
Did what it supposed to do.
J**S
works a treat
worked well definitely use again
P**S
Item
Very happy
J**J
Best product but fragile packaging
This is consistently the best product of this type to use. It isn’t cheap but this pack was crushed in transit. Whilst functional the tube needs completely reshaping before application.
J**E
Excellent Product
I had a leaky sunroof (it's not draining properly and cleaning the channels repeatedly has done nothing) on my truck and have tried quite a few products already. But none of them could hold up to the Florida heat and weather, and would end up deteriorating and crumbling. I tried this product on the seal around the window and have had no leaking whatsoever. This stuff comes out like a thick black, tar-like caulking and is NOT easily cleaned from the hands or anything else you get it on, so be careful. You'll need gas or WD-40 (or something similar) to remove this stuff. Or just wear gloves, if you're messy like me. When it dries, though, it turns into a thick rubber-like seal that has elasticity and works extremely well; it is still holding up with no problems at all. Another bonus is that because it's a silicone seal, you can easily "peel" this stuff off if you ever want to remove it. Just pry up a part of the coating, and it'll all peel away in a big strip. And when I purchased this, it came as the product that is shown (with nozzle). There are also tubes of this product available, which I've used since and had no problems applying it.
A**A
Recommend
Good silicone and good price. I always order this.
T**N
Very good stuff!
Very solid drying silicone for most auto jobs.Works great on the china rails on Ford and Chevy small and big blocks.I have used it on oil pans and valve cover gaskets and have never had a issue. I buy it buy the case because the parts stores are much to high, I keep it in the house so it will last much longer due to temp being controlled.
W**R
防水シーリングとして使用
グリルマーカーを付けるためにグリルに穴あけをして裏側の配線ごと接着、防水シーリングとして使用。一晩放置で完全に固まって3ヶ月経ってもグラ付きは無いです。効果は文句無し。ただチューブ製なので作業しているとやがて手が真っ黒になって洗い落とすのが大変になるので手袋が必須です。
M**R
Fixed my door seals !!! 10/10 ! Must buy strong hold !
I read the comments first before purchasing and they were not lying ! So my weather strip on my car both driver side and passenger door start peeling off. I should have made a video so yall can see that this stuff actually works ! Last night it rained and I applied this product before it rained. And guess what I came out side to look inside my car to see if rain got in there ! And yall no rain made it inside my car ! Not even a single drop ! The tackiness is 10/10 ! Yes it’s heat resistant and a cheap fix for fixing your door seals. Now make sure y’all before when squeezing the product out because it can be a little messy , if you’re not careful. But other than that 10/10 so glad I brought this ! No odor smell to it at all and dries fast.
Trustpilot
2 months ago
1 month ago