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🖤 Seal it like a pro—durability meets sleek design!
J-B Weld 31319 Black RTV Silicone Sealant & Adhesive is a 3 oz industrial-grade, waterproof silicone designed for sealing and bonding uneven surfaces. It cures at room temperature by reacting with air moisture to form a tough, flexible, and weather-resistant seal that won’t shrink or crack. Ideal for automotive, household, and general-purpose repairs, its black color offers a professional finish that blends with dark materials. Trusted by thousands for precision application and long-lasting durability.

| ASIN | B00ID8F8E4 |
| Best Sellers Rank | #1,335 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #6 in Silicone Adhesives |
| Brand | J-B Weld |
| Brand Name | J-B Weld |
| Color | Black |
| Compatible Material | Rubber |
| Container Type | Tube |
| Customer Reviews | 4.5 out of 5 stars 6,978 Reviews |
| Full Cure Time | 24 Hours |
| Global Trade Identification Number | 00043425313195 |
| Included Components | JBWeld 31319 |
| Item Form | Liquid |
| Item Package Quantity | 1 |
| Item Type Name | BONDING_ADHESIVES |
| Item Weight | 109 Grams |
| Manufacturer | JBWeld |
| Material | Plastic |
| Material Type | Plastic |
| Model | 31319 |
| Other Special Features of the Product | Crack Resistant, Strong, Waterproof |
| Part Number | 31319 |
| Special Feature | Crack Resistant, Strong, Waterproof |
| UPC | 043425313195 |
| Unit Count | 3.0 Ounce |
| Volume | 3 Fluid Ounces |
| Warranty Description | Manufacturer Warranty |
| Water Resistance Level | Waterproof |
N**N
Dependable Sealant and Adhesive: A Review of J-B Weld 31319 Black RTV Silicone Sealant
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.
P**D
Awesome price and great quality
Works great
M**O
Great product
Great product, works well
S**S
Good
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.
S**E
Best general purpose RTV I have ever used
The ULTIMATE black is the best working and curing product I have ever used from any RTV manufacturer. It smooths on like soft butter with no clumping, excess cleans off easily, and it cures into a true rubber-like material. It makes great gaskets and sealer. The only other RTV product I buy now is the extreme high-temperature red or copper. J-B Weld Ultimate Black is not formulated for high-temperature use on vehicle exhaust headers and connections.
E**L
Good quality silicone
Works well, it's good quality silicone so should last not a gigantic container so keep it in mind if you have a large area to apply. Also if you try to squeeze the tube to strongly you'll pop the tube seams. Super water resistant and good consistency.
I**Y
Black Rubber Sealant
The stuff works. I used it to glue black rubber soles back onto a pair of clogs and it’s holding solidly!
S**Y
Lucky Lefty
I low-key try to do small odd carpentry and plumbing jobs for myself and my folks from time to time so I found this JBWeld All Purpose to be saving the day one day. Hey Thanks.
I**.
Resiste altas temperaturas y el aceite,excelente producto
Es el mejor producto
F**Q
Very good
It's nice no smell too much and bonds very fast
M**O
Cumple las expectativas
Cumple las expectativas
J**O
Lo recomiendo
Me sirvió para pegar en mi BMW y lo soporto ya que se maneja temperaturas altas, 100% recomendable
A**R
Great
Only the casing is a bit abused
Trustpilot
2 weeks ago
2 weeks ago