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Blarenberglaan 5
2800 Mechelen

HTMS, short for High Tech Metal Seals, is a privately owned company, founded in 1999 by a group of sealing specialists. For more than 20 years we have been designing, developing and manufacturing elastic or resilient metal sealing solutions for the most demanding applications in numerous markets.

A passionate and determined team that has built tremendous design and production expertise throughout the years makes HTMS one of the global leaders in the metal sealing industry.

Driven by operational excellence and the common goal to find and deliver the best possible solution on the market is what makes HTMS the preferred partner for our customers. Together we develop metal sealing solutions of the highest quality standard meeting customer specifications.

Metal O-Seal

Spring Energised Metal O-Seal

Metal C-Seal

Spring Energised Metal C-Seal

Spring Energised Aluminum C-Seal

Metal Oysterseal®

Metal Commaseal®

HTMS’ resilient metal seals are used in a wide variety of applications where normal seals cannot cope with extremes of temperature, pressure, medium or combinations thereof.


HTMS specialises in metallic seals, serving all markets including aerospace, nuclear, oil & gas (both subsea and topside), automotive, industrial, medical…


HTMS is dedicated to produce resilient metal seals under the most stringent quality procedures. The company is ISO 9001, AS 9100 and ISO 14001 certified.


100% LP test on O Ring seal welds

X-ray of weld area on request

Fully integrated Helium leak test facility

Hydrostatic pressure testing up to 90 MPa

Seating load and spring back measurement equipment

XRF on plating layers

CNC optical measurement for in-line and end control


More than 100 years of experience

In-house testing

R&D for new products

Close cooperation with universities

Development of new production methods and new sealing solutions