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J-B Weld 31319 Black RTV Silicone Sealant and Adhesive - 3 oz.

4.6 out of 5 stars 4,412 ratings

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Currently unavailable.

We don't know when or if this item will be back in stock.
  • General purpose black RTV silicone designed for sealing and bonding uneven surfaces
  • Great for weather stripping, moldings, interior trim, windows and more
  • Forms a tough, waterproof seal on most surfaces
  • Sets in 1 hour and will not shrink or crack
  • J-B Weld is proudly made in the USA

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Product description

J-B Weld Black RTV Silicone Sealant and Adhesive

J-B Weld Black Silicone Sealant and Adhesive is a general purpose RTV (Room Temperature Vulcanized) Silicone, designed for sealing and bonding uneven surfaces. Upon curing, which occurs when the product is exposed to the moisture in air, the silicone forms a tough, waterproof seal on most surfaces. It will not shrink or crack, resists weathering and is great for many automotive accessories and household applications.

Great for:

  • Bonding and Sealing
  • Weather Stripping
  • Moldings
  • Interior Trim
  • Windows
  • Windshields
  • Door Frames
  • Lens Housings

  • Use on:
  • Automotive
  • Metal
  • Rubber
  • And more

  • Instructions

    1. Prepare: Clean surface area of dirt, grease, oil, paint or loose debris. For best results use a detergent or degreaser to first clean the surface, then roughen surface with file or coarse sandpaper to provide the best repair.
    2. Apply: Apply even, continuous ¼ inch bead of Silicone to one surface area. Surround all bolt holes with Silicone.
    3. Assemble: Reconnect parts while Silicone is wet.
    4. Secure: Hand tighten until Silicone begins to squeeze out.
    5. Dry: Allow drying for 1 hour and then tighten an additional 1/2 turn.
    6. Finish: Scrape or cut away excess cured sealant. Silicone will fully cure in 24 hours.

    J-B Weld is proudly made in the USA



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    Most helpful customer reviews on Amazon.com

    Amazon.com: 4.3 out of 5 stars 643 reviews
    Elbeau
    4.0 out of 5 stars Stays flexible. Doesn't Let Go
    22 May 2019 - Published on Amazon.com
    Verified Purchase
    38 people found this helpful
    Brenna M. Olson
    5.0 out of 5 stars Satisfied! Good for rednecking vehicle repairs.
    3 June 2018 - Published on Amazon.com
    Verified Purchase
    58 people found this helpful
    E. Heinrich
    1.0 out of 5 stars First squeeze of tube pushed silicone out the wrong end
    29 July 2019 - Published on Amazon.com
    Verified Purchase
    29 people found this helpful
    Steve Day
    5.0 out of 5 stars Perfect for leak-proof gaskets or electrical isolation on vehicles and general repairs.
    16 April 2019 - Published on Amazon.com
    Verified Purchase
    18 people found this helpful
    Needs More BLK
    1.0 out of 5 stars Worked but cracked off on hottest areas of smoker firebox.
    23 August 2017 - Published on Amazon.com
    Verified Purchase
    Customer image
    1.0 out of 5 stars Worked but cracked off on hottest areas of smoker firebox.
    Reviewed in the United States on 23 August 2017
    it worked well on SOME of the areas on my smoker that don't get that hot, but some of the hot areas of my firebox on my smoker cracked and broke and flaked right off, even after a good cleaning/brushing of debris and a two day cure.

    I will buy some more an apply it again to confirm it's use. It did plug a lot of the needed areas though.

    My infared themomoter only ready at 550 degrees and the packaging stated it can hold up to 650 degrees.
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    28 people found this helpful