Manufacturer | JBWeld |
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Brand | J-B Weld |
Model | 31316 |
Item Weight | 3.17 ounces |
Product Dimensions | 1.97 x 1.57 x 6.3 inches |
Item model number | 31316 |
Is Discontinued By Manufacturer | No |
Manufacturer Part Number | 31316 |
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J-B Weld 31316 RTV Silicone Gasket Maker and Sealant - 3 oz. - Blue
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Enhance your purchase
Color | Blue |
Brand | J-B Weld |
Package Information | Tube |
Item Volume | 90 Milliliters |
Water Resistance Level | Waterproof |
About this item
- Make sure this fits by entering your model number.
- RTV SILICONE SEALANT & ADHESIVE: Is a general purpose RTV (Room Temperature Vulcanized) Silicone, designed for sealing and bonding uneven surfaces
- WHAT THE PROFESSIONALS USE: Builders, mechanics & repair pros know our products bond strong to a variety of surfaces in even the toughest environments. Choose the product pros trust for your project
- EASY TO USE: Upon curing, 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 uses
- VERSATILE & DEPENDABLE: Ideal for bonding, sealing, weather stripping, moldings, interior trim, windows, windshields, door frames, lens housings and more
- DO IT YOURSELF: Big or small, you can DIY it with J-B. Our heavy duty adhesives repair & restore it right the first time. JB Weld delivers the legendary performance of the World's Strongest Bond
- Flash point: 3000.00 degrees_celsius
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From the manufacturer

J-B Weld Silicone Sealant & Adhesive
J-B Weld Blue Silicone Gasket Maker & Sealant is an RTV (Room Temperature Vulcanized) Silicone gasketing material designed for use in mechanical assemblies, sealing and bonding even surfaces. Upon curing, which occurs when the product is exposed to the moisture in the 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 applications.
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J-B Weld Blue RTV Silicone | J-B Weld Clear RTV Silicone | J-B Weld White RTV Silicone | J-B Weld Hi-Temp RTV Silicone | J-B Weld Ultimate Grey RTV Silicone | J-B Weld Ultimate Black RTV Silicone | |
Product Description | J-B Weld Blue Silicone Gasket Maker & Sealant is designed for use in mechanical assemblies, seling and bonding uneven surfaces. Upon curing, it will not crack or shrink, resists weathering, is sensor safe and is great for many automotive applications | J-B Weld Clear RTV Silicone Sealant is a general purpose adhesive designed for household or mechanical assembly applications. It will not crack or shrink, resists weathering, is sensor safe and is great for many household & automotive applications. | J-B Weld White RTV Silicone Sealant & Adhesive is a general purpose adhesive designed for household or mechanical assembly applications. Upon curing, it will not crack or shrink, resists weathering, is sensor safe and is great for many applications. | J-B Weld Hi-Temp RTV Silicone & Gasjet Maker is designed for use in mechanical assemblies where the continuous temps up to 550F or 650F might exist. It will not shrink, crack and resist weathering. It is sensor safe for many auto applications. | J-B Weld Ultimate Grey RTV Gasket Maker & Sealant is designed for use in mechanical assemblies where higher torque or closely spaced bolt profiles. It will not shrink or crack, resists oil & petroleum products, weathering and up to 500F. | J-B Weld Ultimate Black Gasket Maker & Sealant is designed for mechanical assemblies where maximum petroleum and oil resistance is required. It will not shrink or crack, is sensor safe, resists oil & petroleum products, weathering, and 500F. |
Surface Application | Great for: Timing Gear Covers, Transmission Pans, Oil Pans, Water Pumps, Valve Covers, Differential Covers, Thermostat Housing and more! | Great for: Windshield, Windows, Lens Housing, Door Frames, Tub & Shower, Aquariums and more! | Great for: Tub & Shower, Sinks & Bathroom Fixtures, Windows, Interior Trim, Moldings, Door Frames, Lens Housing and more! | Great for: Oil Pans, Valve Covers, Exhaust Manifolds, Water Pumps, Timing Covers, Differential Covers, Drive Housing, Oven Doors & more! | Great For: Import Vehicles, Intake Manifolds, Transmission Pans, Oil Pans, Timing Gear Covers, Cam Covers and more! | Great For: Oil Pans, Valve Covers, Transmission Pans, Timing Gear Covers. |
Cure Color | Blue | Clear | White | Red | Grey | Black |
Set Time | 1 Hour | 1 Hour | 1 Hour | 1 Hour | 1 Hour | 1 Hour |
Cure Time | 24 Hours | 24 Hours | 24 Hours | 24 Hours | 24 Hours | 24 Hours |
Product Description
J-B Weld 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.
Product information
Technical Details
Additional Information
ASIN | B00LIRG8VY |
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Customer Reviews |
4.6 out of 5 stars |
Best Sellers Rank | #304 in Industrial & Scientific (See Top 100 in Industrial & Scientific) #52 in Industrial Adhesives, Sealants & Lubricants |
Date First Available | July 24, 2014 |
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Customer Rating | 4.6 out of 5 stars (8708) | 4.5 out of 5 stars (607) | 4.6 out of 5 stars (1372) | 4.6 out of 5 stars (177) | 4.6 out of 5 stars (2625) | 4.5 out of 5 stars (1462) |
Price | $7.11$7.11 | $11.00$11.00 | $7.97$7.97 | $4.99$4.99 | $10.79$10.79 | $6.17$6.17 |
Sold By | Family-1st Industrial | inconsupply | Amazon.com | Amazon.com | Island Outdoor, LLC | Amazon.com |
Color | Blue | Red | Black | — | Multicolor | Black |
Item Dimensions | 1.97 x 1.57 x 6.3 inches | — | 2.13 x 2.13 x 7.75 inches | 1 x 3.81 x 8 inches | — | 1.25 x 2.13 x 7.75 inches |
Customer reviews
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Reviewed in the United States on August 22, 2017
Top reviews from the United States
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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.
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.

Reviewed in the United States on August 22, 2017
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.


I purchased a cheap knockoff simply to replace the lens. Doing this my greatest worry was that moisture would get into the housing if not sealed correctly.
Well, the very afternoon after I sealed up the new lens I get caught in some monsoon riding conditions. Visibility was less than two car lengths and lighting was too close (you know that sensation when your excrement excreter puckers...that close). Anyway... long story short, this sealed up the lens weather tight, no moisture.
I’m happy.

Reviewed in the United States on July 28, 2020
I purchased a cheap knockoff simply to replace the lens. Doing this my greatest worry was that moisture would get into the housing if not sealed correctly.
Well, the very afternoon after I sealed up the new lens I get caught in some monsoon riding conditions. Visibility was less than two car lengths and lighting was too close (you know that sensation when your excrement excreter puckers...that close). Anyway... long story short, this sealed up the lens weather tight, no moisture.
I’m happy.




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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.
Top reviews from other countries

I applied / installed this around 4 weeks ago now and all still seems spot on. I think if there were to be a problem, I would have noticed long before now.



