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Your cart is empty.J-B Weld Black Silicone Sealant & 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.
Antrobus
Reviewed in the United States on February 22, 2025
Hard to get out of the tube most of it dry up. I Let set for 3 days because it was cold out when delivered. I got small job done will not buy again. Better go to the store to buy fresh tub.
Colin Bailey
Reviewed in the United Kingdom on February 2, 2025
Easy to apply does the job
Chief
Reviewed in the United States on February 12, 2025
Spreads easy, cures fast, keeps out the leaks, seems to last a while.
Louis Pepe
Reviewed in the United States on January 26, 2025
I'm familiar with this brand from past experience in hobbies and even when I was in the Navy. Worked well when my wife did a self-repair on her rain boot sole that developed a small crack where the sole flexed. She did the repair as I watched. Everything went as planned. Easy to use. The boot sat for 24+ hours to cure the seal. A wet test in the sink showed no leaks. A puddle test after the next rain also showed a great fix.
MechEng
Reviewed in the United States on January 13, 2025
Used this on the crankcase cover assembly and timing chain cover for my kids 2003 Camry with the 2.4L AZ-FE 4 cylinder. It's thick stuff. A real hand workout squeezing a line of this stuff evenly with shaking hands from strain.
philip
Reviewed in Canada on August 26, 2024
Use this fix the kitchen sink, so far working good
JD
Reviewed in Mexico on June 16, 2024
Excelente silicon para sellar, me funcionó muy bien.
Nathaniel Bornstein
Reviewed in the United States on February 29, 2024
I recently had the opportunity to use the J-B Weld 31319 Black RTV Silicone Sealant and Adhesive, and I must say, I am thoroughly impressed with its performance and versatility. As someone who frequently tackles DIY projects and repairs around the house, finding a reliable sealant and adhesive is essential, and this product certainly delivers.One of the standout features of the J-B Weld 31319 is its exceptional durability. Once applied, it forms a strong and resilient bond that withstands a wide range of environmental conditions, including temperature fluctuations, moisture, and vibration. Whether I'm sealing gaps in plumbing fixtures or bonding materials together, I can trust that this silicone sealant will hold up over time.Another aspect of this product that I appreciate is its ease of use. The nozzle allows for precise application, minimizing waste and mess during the sealing process. The consistency of the sealant is ideal—not too runny, yet smooth enough to spread evenly and fill in cracks and gaps effectively. Cleanup is also a breeze, as the excess sealant can be easily wiped away with a cloth or sponge.The black color of the sealant is a nice touch, especially for applications where aesthetics are important. It blends seamlessly with dark surfaces, providing a clean and professional finish that enhances the overall appearance of the project.Furthermore, the versatility of this product makes it a valuable addition to any toolkit. Whether I'm sealing leaks in automotive components, repairing household appliances, or even crafting custom projects, the J-B Weld 31319 proves to be a reliable solution time and time again.In conclusion, I can wholeheartedly recommend the J-B Weld 31319 Black RTV Silicone Sealant and Adhesive to anyone in need of a dependable sealant and adhesive for a variety of applications. Its durability, ease of use, and versatility make it a standout product in its category, and I will certainly continue to rely on it for all my sealing and bonding needs in the future.
R. Murray
Reviewed in the United States on December 20, 2024
I had to change the valve cover in my ALH diesel motor. The replacement requires a high quality RTV in four specific locations. I’ve always been a fan of JB Weld products so I gave this a shot. It hasn’t let me dow. I got 2500 miles now on the new valve cover and nary a drop of oil is leaking.
R2D
Reviewed in the United States on December 16, 2024
Works well mounting antlers to Mountain Mike skull master kit to eliminate horn slippage after curing.
Samuel Mullis
Reviewed in the United States on November 5, 2024
I used this on this for a valve cover gasket and it worked alright. The tube basically blew out the back end when squeezing so be careful. But other than that it was fast easy and dried quick, which is what I needed. It’s as easy to remove as most siliocine caulkin. And it stuck pretty good. You get a decent amount per tube. More than you could ever need for 1-3 jobs. And the color was what I needed, but if you’re using this like you should, the color should matter as it’ll be hidden for the most part. Over all, it’s good but I which the actual tube it’s held in was More durable, no reason it should bust open just from squeezing it. But the size is good, you get a lot of it.
FAROUQ
Reviewed in the United Arab Emirates on June 8, 2023
It's nice no smell too much and bonds very fast
tomas
Reviewed in Mexico on January 29, 2023
Se puede poner como juntas de bombas de agua de motores de combustión interna y otros usos y una ves puesta la pieza con este silicon se puede encender el automóvil sin esperar a que seque y no hay fuga de agua
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