What Are Aircraft Fuel Tank Sealants?

Fuel tank sealants are an essential element of standard aircraft fuel systems, such components being responsible for maintaining the integrity of the tank, preventing leaks, and ensuring the overall safe operations of aircraft during flight. In this blog, we will provide a brief overview of fuel tank sealant products, allowing you to have a better understanding of what they are and how they work to keep aircraft fuel systems secure and safe.

In general, a fuel tank sealant should be made from polymer-based materials and is designed to be applied to the interior surface of the assembly. When installed, such sealants form a barrier between the fuel and tank itself, preventing the chance of fuel escaping while also guarding surfaces from corrosion. When applying a fuel tank sealant, it is critical that one follows the right process to ensure that everything is correctly cleaned and primed for a reliable and secure seal to be established.

The first step of this process is thoroughly cleaning the fuel tank to remove any possible dirt, debris, or old sealant that is present within the interior of the assembly. Furthermore, always be sure to use products compatible with your tank so as to not cause any damage, and one should always wear protective gear due to the flammability of fuel and other associated hazards. Once cleaning is done, the tank can have a primer applied to surfaces so that they are prepped for the sealant. The primer is essential as it promotes seal adhesion and further mitigates corrosion.

The fuel tank sealant itself should be applied in several layers so as to create a thick and durable coating. When choosing between sealant materials, one must consider the specific requirements of the fuel system, including any temperature or chemical resistances. Additionally, the chosen fuel tank sealant will also need to perform well under high temperatures, pressures, and with exposure to corrosive fuels.

One of the most common tank sealant options is polysulfide, and these sealants are known for being quite flexible and durable. These seals are commonly used in aviation applications and are applied in two to three coats to establish a thick and flexible sealing solution. Another common fuel tank sealant option is epoxy, and this material features ample strength and corrosion resistance. These sealants are typically applied in one or two coats.

With the proper addition and management of fuel tank sealants, one can both enhance the safety of their operations while lowering overall operational and maintenance costs by extending the lifespan of the tank. To uphold sealant quality, regular inspections should be carried out to ensure that there are no signs of deterioration, cracks, or issues that could lead to leaks. By identifying any issues early on, repairs or replacements can quickly be carried out before something leads to a more costly problem further down the line.

When you are shopping for top-quality fuel tank sealants for your aviation operations, there is no better option than NSN Sourcing for all your fulfillment needs. On our website, we present competitive pricing and rapid lead times on over 2 billion new, used, obsolete, and hard-to-find products that trace back to thousands of leading manufacturers that we trust. Take the time to explore our offerings as you see fit, and you may always fill out and submit an RFQ form at any time to begin the quotation process with us. Once we have a chance to receive and review a completed form, a member of our staff will contact you in 15 minutes or less to present a tailored solution for your comparisons. Get started today and see why so many customers steadily rely on our fulfillment services for their operational needs!


Recent Twitter Posts

Semiconductor's Certifications and Memberships
The only independent
distributor with a
  • All Orders are Fulfilled in the U.S.A.
  • All shipments must comply with U.S.A export laws.
  • No exceptions.
Intrepid Fallen Heroes Fund

“We Proudly Support Intrepid Fallen Heroes Fund that serves United States Military Personal experiencing the Invisible Wounds of War : Traumatic Brain Injury (TBI) and Post Traumatic Stress (PTS). Please visit website (www.fallenheroesfund.org) and help in their valiant effort”.

Thank You for Visiting NSN Sourcing.

If You’d Like to GET Quote For Latest NSN Parts, Just Fill The Instant RFQ Form And Get Reply Within 15 Minutes.

Request for Quote

We use cookies to ensure that we give you the best experience on our website. If you continue to use this site we will assume that you are happy with it.