Custom Hermetic Seals

Industries spanning defense, telecommunications, aerospace, and automotive electronics rely on HST’s Custom Hermetic Seals for their critical applications. Trust us to deliver customized solutions that meet your unique requirements with precision and excellence. Contact us today to discuss your needs and experience the difference with HST!

Custom Hermetic Seals Tailored by Hermetic Seal Technology

With our extensive expertise in designing and manufacturing various hermetic seals, HST offers customized solutions to meet all your leak-tight power feed thru requirements. From initial design and prototype production to high-volume manufacturing, our capabilities cover every aspect of custom seal production, ensuring precision and reliability.

Key features of our Custom Hermetic Seals include:

  1. Versatile Material Selection: We have the flexibility to work with a wide range of materials for the body, insulation, and conductor parts of your hermetic seals, including stainless steel, Inconel, mild steel, titanium, molybdenum, and other exotic alloys.
  2. Tailored to Extreme Conditions: Our seals can be designed to withstand very high temperatures, pressures, or other extreme environmental conditions, ensuring durability and performance in the most demanding applications.
  3. Plating Options: Enhance functionality and longevity with our plating options such as gold plating, silver plating, and electrolytic nickel plating, providing additional protection and conductivity where needed.

Production Capability

We have the ability to handle orders from ten parts to millions of parts.
We can also do sample parts.

HST can help you with free hermetic seal design and development to insurance you have a reliable and robust glass to metal seal.


  • Brazing
  • Glass Formulation
  • Glass Sealing
  • Resistance Welding


  • Exotic Alloys
  • Mild Steel
  • Stainless Steel
  • Titanium
  • And Many Others
  • Babal
  • Cabal 12 and other low silica glass
  • Corning 9010
  • Corning 9013
  • HST Custom Lithium Corrosion Resistant Glass
  • TA-23
  • Other Borosilicate, Barium Alkali, and Soda-Lime
  • Alloy 52 and Copper Cored 52 Alloy
  • Molybdenum
  • Platinum-Iridium
  • Stainless Steel and Copper Cored Stainless Steel
  • Other Materials Available Upon Request
  • Copper Plating
  • Electroless Ni Plating
  • Electrolytic Ni Plating
  • Hard Gold Plating
  • Pure Gold Plating
  • Silver Plating
  • And Many Others
  • Less than 1 x 10^8 cc/sec helium leak rate
  • All HST seals are 100% leak tested to ensure quality and performance
  • Diode and Hybrid Packages
  • Battery and Power Feed-Troughs
  • Microwave Packages
  • Photodiode Housings
  • Quartz Crystal Packages
  • Sensor Packages
  • Transducer Packages
  • Transistor Packages
  • Others

Industries Served








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Contact Hermetic Seal Technology Today

Precision hermetic seals tailored to your needs! From design to high-volume manufacturing, we’ve got you covered. With materials like stainless steel, titanium, and exotic alloys, our seals withstand extreme conditions. Trusted by defense, aerospace, and automotive industries. Contact us today!