Discover the advantages of Glass-to-Metal Seal (GTMS) technology over traditional sealing methods. Optimize the hermeticity and durabilityof your electronic components in extreme conditions.
In industries where failure is not an option—from aerospace exploration to high- precision medical instrumentation—the integrity of electronic components depends on one critical factor: hermeticity.
At Vac-Tron, after years of leading the design of custom-engineered solutions, we know that protecting electronics in high vacuum, high-pressure, or extreme-temperature environments requires more than simple insulation. It requires Glass-
to-Metal Seal (GTMS) technology.
What Is Glass-to-Metal Sealing (GTMS)?
GTMS is an advanced engineering process in which glass is fused directly to a metallic component, creating a permanent hermetic bond. Unlike organic seals (such as epoxies or polymers), glass does not degrade over time, does not allow gas
permeation, and withstands severe thermal cycling.
Why Choose GTMS for Your Critical Projects?
If you are designing sensors, connectors, or terminals, these are the three reasons why glass-to-metal sealing is the technically superior choice:
Permanent Hermeticity
Provides an absolute barrier against moisture and contaminants, maintaining extremely low helium leak rates (typically below 1 × 10⁻⁸ mbar·L/s).
Resistance to Harsh Conditions
GTMS seals operate successfully in temperature ranges from -200°C to over 400°C, withstanding pressures of up to 50,000 psi.
Superior Electrical Insulation
Glass acts as an exceptional dielectric insulator, allowing electrical signals to pass without interference—even at extremely small dimensions.
Applications: Where Precision Meets Durability
Our custom solutions are used in applications where reliability is the number one priority:
- Industrial Sensors: Protection of electronics in aggressive chemical processes.
- Energy Systems: Insulation in high-voltage equipment and vacuum environments.
- Medical Equipment: Sterilizable and biocompatible components.
The Value of Custom Engineering
At Vac-Tron, we don’t believe in one-size-fits-all solutions. Every application presents unique challenges in thermal expansion, conductivity, and geometry. That’s why our specialty is custom design, working closely with your engineering team from the prototype phase through final production.
Ready to Seal Your Next Critical Design?
Are you working on a project that demands absolute hermeticity?
At Vac-Tron, we transform complex technical challenges into robust engineering
solutions. Contact our engineering team today and let’s discuss how to optimize
your next design.

