|Product Dimensions||22.86 x 12.7 x 5.08 cm; 108.86 Grams|
|Item model number||31319|
|Manufacturer Part Number||31319|
|Material||Silicone Sealant and Adhesive|
|Cover Included||J-B Weld 31319 Black RTV Silicone Sealant and Adhesive - 3 oz.|
|Item Weight||109 g|
J-B Weld 31319 Black RTV Silicone Sealant and Adhesive - 3 oz.
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- 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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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.
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
I had prepped the window seal I planned to silicone and began gently squeezing the tube. Some thick black silicone came out the applicator nozzle tip as expected, but unexpectedly a large glob of silicone flowed out the other end of the tube which is supposed to be sealed. Much like a toothpaste tube, typically there is an initial crimped fold of the base of the tube which in this case, appeared to be unfolded, and un-crimped in this tube allowing the silicone to simply push out the wrong end. I had not noticed the defect when I first unpackaged the tube as the bottom end was flat and aligned.
Needless to say it was a terrible mess. I had silicone all over my gloves, on my car body and window, and was really frustrated. I suspect a manufacturing failure to fold and crimp seal the end of the tube. I spent the next 30 minutes cleaning everything up and throwing out gloves, rags, and paper towels. I wish I could try it again but not going to risk buying another bad tube. I'll stick to other J-B Weld products for now.
I first cleaned up the area till it was spotless - preparation is key with any adhesive or paint! It goes on easily and you can use a wet finger to contour it and smooth it out.
It cleans up easily when "wet" using shop towels and isopropyl/rubbing alcohol.
If you replace the cap and pull out the cured silicone plug from the nozzle you can use it repeatedly.
I ended up needing it for another fix one month later and it was still good. In fact, I'm going to order another to keep as a spare for repairing stuff, because it's extremely handy for any small fixes that could use some water-tight electrically-insulating silicone sealant.
Update - I've gone through a couple of more tubes now and this is definitely my favorite product of this type. It has a better bond that other black silicone RTV products I've used. Definitely a different odor but maybe that has something to do with its superior performance. I've used it for oil-resistant gaskets on my motorcycle, various electrical applications as an insulator with high temperature bond strength, to secure thermocouples that go up to 500F, and other miscellaneous applications where I need an elastomeric bond that will withstand water and high temperature.