Custom Hermetic Seals

While epoxy seals have a bad reputation for being “non-hermetic,” the truth is, epoxy seals can perform just as well or even better than ceramic and glass seals in many applications. Our epoxy seals have outgassing and leak rates as low as ceramic seals with even better flexibility in low and high volume needs. Epoxy seals are the best choice for custom shapes and designs. Frequently used in fiber optic and electrical hermetic seals, epoxy seals can effectively seal gases and fluid, including helium gas, with very low helium gas rates.

With excellent resistance to oils and gasoline, epoxy seals are also the ideal choice for energy, aerospace, and automotive industries with the ability to withstand high pressure and temperatures ranging from -100C to 250C.

Epoxy seals are also a common alternative to ceramic-to-metal and glass-to-metal seals in semiconductor manufacturing given today’s shielding requirements and space constraints. In semiconductor manufacturing, the typical benefits of glass-to-metal seals, such as extreme temperature resistance and resistance to corrosive chemicals, are not needed. When maintaining a clean vacuum chamber is the top priority, epoxy seals beat glass-to-metal in terms of versatility and cost.

Epoxy offers the best of both ceramic and glass seals at a lower cost. Epoxy hermetic seals even come with the design flexibility to seal copper alloy pins or wires rather than using the far less electrically conductive nickel-iron pins used in glass hermetic seals. Epoxy seals can be routed through tight spaces and angles, tightly seal any feedthrough shape, and handle any type of cable or wire. They are frequently used to solve design challenges that can’t be addressed easily with glass or ceramic seals.

Our experienced engineering team oversees every made-to-order hermetic seal project from the early design stages through the manufacturing process. Most of our custom pressure feedthrough and vacuum feedthrough seals begin with an email from a customer with a specific fiber optic, cable, or wire that is already in their system but needs to be sealed. If you can supply the connector or wire, it can be used to create your custom RHSeals hermetic seal.

If you are ready to move forward, we will create a detailed drawing for your approval before our manufacturing process begins. Our sales and engineering teams will work with you to complete the process as quickly as possible to deliver a robust and cost-effective seal for your application delivered promptly.

Whether you already have drawings for your needed feedthrough, you have a wire or cable in your system that needs to be sealed,or you are interested in manufacturing a prototype, contact us today to receive a detailed quote.

While a custom seal may sound like an expensive solution, our engineering team specializes in flexible tooling to reduce lead time and product costs. Our custom seals prevent the problems associated with standard seals that aren’t quite right, including high maintenance expenses, wasted space, and unnecessary part replacement.

RHSeals is committed to providing you with the custom fit you are looking for while remaining a cost-effective option. We process low volume, high volume, and prototype orders with the same dedication to on-time shipment.

Even custom seals can ship in just two weeks with full support from our engineering team to create the perfect hermetic seal for your application. We even guarantee made-to-order hermetic seals to be shipped by the promised date with a limited lifetime warranty on every seal we manufacture. Whether you need a prototype or you already have a cable or wire in your system that needs sealed, we can help.

Contact RHSeals to develop a drawing for the hermetic seal you need for your application and receive a detailed quote.