Is J-B Weld Gas-Resistant?

Have you ever wondered about how an adhesive works? Or have why you should choose a particular type over another? So often, it’s easier just to grab that bottle of glue from your garage or kitchen drawer and hope it will fix and repair what is faulty, broken, or whatever needs repair. But why glue it when you can J-B Weld it?

What is J-B Weld?

Also known as “The Original Cold Weld,” it was developed as an alternative to torch welding. It is a specialized, high-temperature epoxy adhesive that is used for bonding materials together. It is specially designed to be effective in even the harshest and extreme of environments. Imagine it as having a cross-woven pattern responsible for providing extra strength, much like the way and manner in which rebar does to reinforce cement structures. 

It is extremely effective as it is tougher than steel once it sets. Whether you choose the original twin tubes, the syringes or the putty sticks they’re very easy to use.

Why is J-B Weld Gas Resistant?

J-B Weld is gas resistant because it can withstand a high temperature of up to 300-degrees and a pressure of 900 psi once cured. This combines to create the desired effect. It is the fastest way in which you can keep that expensive fuel in the tank and not on the asphalt. It uses reactive chemistry to create the strongest bond possible because it’s a two-component (or 2k) epoxy system.

Can J-B Weld be Used on Gas Tanks?

J-B Weld forms a metal surface that can withstand high temperatures and is not affected by gasoline. Thereby making it a popular product for repairing metal fuel tank leaks to prevent further spillage or leakage of gas.

J-B Weld is completely resistant to water, gasoline and almost every other automotive chemical petroleum product when fully cured. For submerged water, wet surface, or gasoline repairs, try the SteelStik or WaterWeld. Although it has water-resistant properties, J-B Weld is not considered to be a conductor. J-B Weld has a wide range of products that are suitable for different and specific jobs and purposes to ensure you get the right fit product for your need.

Because of its unique features, J-B Weld is capable of repairing and fixing almost anything. It has gotten a big and positive reputation because it has worked for a large number of people who have in turn given positive reviews. It has been proven to be perfect for a leaky gas tank. 

What J-B Weld products do we recommend?

1. J-B Weld 8281 Professional Size Steel Reinforced Epoxy

This product provides a bond that is stronger than steel for the desired long-lasting result. It is perfect for DIY household, marine, automotive, craft repair, and much more.


  • Cure and set time: It take 4-6 hours to set and 15-24 hours to cure after mixing the tubes at a 1:1 ratio. Once it is cured, J-B Weld Original can be tapped, molded, filled, sanded, and drilled. 
  • Dependable and versatile: it has a tensile strength of 5020 PSI and can withstand up to 550 degrees Fahrenheit (287 degrees Celsius temperature). When fully cured, J-B Weld Original is waterproof and resistant to chemicals, acid, and petroleum.
  • Surface applications: It can be used on materials like wood, concrete, metal, plastic, PVC ceramic, tile, and fiberglass.
  • Do it yourself (DIY): you can DIY it with J-B Weld whether big or small as it’s adhesives and heavy-duty epoxy repairs and restores it right the very first time. It delivers quality, superior performance, and great results. That’s why it is the world’s strongest bond.

2. J-B Weld 8272 MarineWeld Epoxy

J-B MarineWeld is made with a two-part epoxy cold weld system with a tensile strength of 3960 PSI for long-lasting repairs and bonding on different surfaces. Surfaces such as aluminum, fiberglass, metal, composites, and others can work with this product.

MarineWeld is fully cured to a dark grey colour in 15-24 hours and sets in 4-6 hours at room temperature. Once cured, it can be easily shaped, sanded, and drilled as desired and will still retain its strength below or above the waters’ surface. The mixing ratio for the MarineWeld is 1:1. 


  • The J-B Weld 8272 MarineWeld Epoxy is capable of withstanding 550°F/288°C when it is fully cured and applied to any material
  • MarineWeld is a waterproof product and is also strong enough to resist petroleum, chemical substances.
  • Versatile surface application
  • Strong And Versatile: this product has a feature of extreme strength. It can be used for household purposes, automotive, outdoor equipment, agricultural equipment, marine, plumbing, crafts, motorcycle, in/outboard engines among many others.


With so many adhesive products on the market, it can be difficult sometimes for any non-professional to gauge or use specific products made for particular needs. It is advised that before buying any J-B Weld product, ensure that it suits the purpose you desire and also make sure to read instructions carefully before using. This will yield the best results for your utmost satisfaction.

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