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Permatex 81158 Black Silicone Adhesive Sealant, 3 oz. Tube

4.5 out of 5 stars 135 customer reviews
| 33 answered questions

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3 Ounce Tube
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  • General-purpose, black RTV indoor/outdoor sealant bonds, repairs, seals, mends and secures glass, metal, plastics, fabric, vinyl, weather stripping and vinyl tops
  • Protects and repairs electrical wiring
  • Works effectively on both horizontal and vertical surfaces
  • Waterproof and flexible with a temperature range of -75 degrees Fahrenheit to 450 degrees Fahrenheit
  • Oil, water, weather, vibration and grease resistant
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Knock Snow Out Cold with Snow Removal equipment at Patio, Lawn & Garden

Frequently Bought Together

  • Permatex 81158 Black Silicone Adhesive Sealant, 3 oz. Tube
  • +
  • Permatex 80050 Clear RTV Silicone Adhesive Sealant, 3 oz.
  • +
  • Permatex 82180 Ultra Black Maximum Oil Resistance RTV Silicone Gasket Maker, 3.35 oz. Tube
Total price: $17.97
Buy the selected items together


Product Information

Size:3 Ounce Tube

Technical Details

Brand Permatex
Item Weight 3.2 ounces
Product Dimensions 1.2 x 3.8 x 8 inches
Origin China
California residents Click here for Proposition 65 warning
Item model number 81158
Manufacturer Part Number 81158
OEM Part Number PMT81158

Technical Specification

Additional Information

ASIN B000AL6WLA
Customer Reviews
4.5 out of 5 stars 135 customer reviews

4.5 out of 5 stars
Best Sellers Rank #1,698 in Automotive (See top 100)
#15 in Patio, Lawn & Garden > Mowers & Outdoor Power Tools > Replacement Parts & Accessories > Lawn Mower Parts & Accessories > Lawn Mower Replacement Parts
Shipping Weight 1 pounds (View shipping rates and policies)
Domestic Shipping This item is also available for shipping to select countries outside the U.S.
International Shipping This item can be shipped to select countries outside of the U.S. Learn More
Date First Available April 1, 2004

Warranty & Support

Warranty, Parts:Parts

Product Description

Size: 3 Ounce Tube

Permatex Black Silicone Adhesive Sealant is a general-purpose, black RTV indoor/outdoor sealant. Effectively bonds, repairs, seals, mends and secures glass, metal, plastics, fabric, vinyl, weather stripping and vinyl tops. Also protects and repairs electrical wiring and may be applied to horizontal or vertical surfaces. Waterproof and flexible with a temperature range of -75 degrees Fahrenheit to 450 degrees Fahrenheit, this sealant is oil, water, weather, vibration and grease resistant. Suggested applications include windshields, door frames, electrical connections, seams and roofs, vinyl tops, and weather stripping.

Customer Reviews

Top Customer Reviews

Size: 3 Ounce Tube
I have found RTV silicone sealant to be an indispensable handy helper with many uses around the house, car, boat, and workshop.

Silicone is a very good adhesive for the right applications, and can be used as a substitute for grommets, rubber cushions, weatherstripping, anti-skid feet, etc. As an adhesive, I have found nothing better than silicone for attaching items to glass. For instance, as a member of a volunteer fire department, I fastened some LED strobe lights to the back window of my truck with it, and they have been out in the weather for 2 years with no inclination of falling off (although you can easily slice through it with a razor blade when you want it to come off). I also have used it inside the truck to glue small electronic devices to the dashboard, console, windows, etc. where I wanted to avoid drilling holes, and it is much more versatile than double-sided tape, except that you have to wait for it to set. For projects like this, it is good to use masking tape to keep it off any surfaces you don't want to get it on, and also to tape the object in place to keep it still until this product dries.

I have used RTV silicone to repair leaks and cracks in rubber hoses. I've used it to patch holes in speaker cones and to insulate electrical plugs. I have even used it to fix cracked roof shingles and leaky gutters. I always keep a tube of white and one of clear silicone on hand too, because whatever color it is coming out of the tube is the color it will be forever...it cannot be painted!

RTV silicone has a shelf life, and I always try to use up any open tube within six months to avoid problems. If you have a tube and don't know how old it is or if it's still usable, test it by squeezing out a dab onto a piece of paper.
Read more ›
1 Comment 27 of 29 people found this helpful. Was this review helpful to you? Yes No Sending feedback...
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Size: 3 Ounce Tube (Pack of 12) Verified Purchase
I use it mainly to weather proof electronic devices on electric bikes I'm building (ebikessf.com), especially to seal around electric cables where they come out of enclosures. This stuff is very sticky - bonds to almost any surface, flexible - doesn't easily crack, doesn't conduct electricity - I use it on circuit boards. However it is toxic, use it in well ventilated areas, wearing respirator is a good idea, definitely wear cloves, this stuff gets under the skin and is really hard to wash off.
Comment 9 of 9 people found this helpful. Was this review helpful to you? Yes No Sending feedback...
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Size: 3 Ounce Tube Verified Purchase
Good product line but I would recommend you use the clear version "Permatex 80050" by the same company and not the black one unless you really need it for some aesthetic reason.

I got one of each and the black one is much more runny and difficult to work with and seems to take longer to dry/cure. It also stinks a lot more and will stain black anything it touches - tools, hands, clothes, work area, etc.

They are pretty much the same price, definitely go with the clear one to make your project and cleanup much easier.
3 Comments 16 of 19 people found this helpful. Was this review helpful to you? Yes No Sending feedback...
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Size: 3 Ounce Tube Verified Purchase
This silicone did both jobs I needed done [help adhere replacement side mirror; repair damaged antenna mount] on my Sable, but it was fluid enough to get all over my hands when I had to move it into place around the antenna and in the gap between the car body and the cracked mount. I'd taped around the mount location so that wasn't too messy, but I had to use lots of paper towels before I went in the house and washed up.
It is primarily for sealing gaskets, but adapted well for these jobs. I still have over half the tube, but if it hardens before I need it again, not much is lost.
Comment 6 of 6 people found this helpful. Was this review helpful to you? Yes No Sending feedback...
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Size: 3 Ounce Tube Verified Purchase
If you need to seal it, stick it, or dampen it, Permatex Silicone Adhesive is the only choice! You can use it as weather stripping around your windows, or like a rubber stopper to keep a door from rattling. I have even used it on upholstery to keep it from fraying were fabric was missing.
Comment 9 of 10 people found this helpful. Was this review helpful to you? Yes No Sending feedback...
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Size: 3 Ounce Tube Verified Purchase
I purchased this to repair a small section of my convertible top that was starting to tear. So far, it is working great and blends in nicely. I've also found other uses for this adhesive and it has come through with flying colors. Every do-it-yourself-er should keep a tube close by.
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Size: 3 Ounce Tube Verified Purchase
This stuff sticks and works well. The only downside is that its hard to remove from you hands. Best to use clear, thin gloves when applying.
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Size: 3 Ounce Tube Verified Purchase
I was hoping this was just an opaque black version of the clear product which I really like. It's not. This is more tar like and harder to spread without making a mess. It smells bad too. I haven't tried competitors producers, maybe they're all the same. But I don't like this stuff.
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