High Tech Metal Seals

HTMS is a privately owned limited company, founded in 1999 by a group of sealing specialists with currently a combined experience of more than 100 years. The plant is located in Mechelen, Belgium.

High Tech Metal Seals, short HTMS, designs and manufactures elastic or resilient metal seals.

HTMS’ Resilient Metal Seals are used in a wide variety of applications where normal seals cannot handle extremes of temperature, pressure, medium or combinations thereof.

Development and Engineering

Development and Engineering of new products is conducted in close cooperation with universities. In house testing equipment facilitates real hardware testing and comparison with FEA results.

The Oysterseal® in our catalogue is one of the results of this bespoken cooperation.

With high accuracy and backed by FEA in cooperation with the University, HTMS can adjust the seals’ cross section, wall thickness, selected alloys, …, in order to adapt seal performance to the variables in service.

News about HTMS


1 January, 2020 Saint-Gobain successfully completed the acquisition of HTMS. You can read more in this press release. 20200107_HTMS_VA

Ariane 5

Ariane 5 has recently been succesfully launched for the 50th time, with HTMS seals!

Watch the video on Youtube.

Agoria about HTMS

Agoria paves the way for all technology-inspired companies in Belgium that increase our quality of life through the development and application of technological innovations. At the occasion of the 20th anniversary of HTMS, Agoria published an interesting article (Dutch only).

Sporty HTMS

HTMS is not only about ‘serious technology’. Fun and sports are essential elements of our company culture. Thus, HTMS recently participated in two events: the Zandvoortcup (soccer – June 2019 and the intercompany beachvolley tournament Mechelen (July 2019).


Fusion, the nuclear reaction that powers the Sun and the stars, is a potential source of safe, non-carbon emitting and virtually limitless energy. Harnessing fusion’s power is the goal of ITER, which has been designed as the key experimental step between today’s fusion research machines and tomorrow’s fusion power plants. HTMS is a proud contributor to the ITER project. Click here for a status update.

Chandrayaan-2 Vikram Lander

HTMS contributes to this project, managed by the Indian Space Research Organisation, Department of Space. Click here to discover a first set of beautiful images of the Earth captured by Chandrayaan-2 Vikram Lander.

Corporate video

HTMS - High Tech Metal Seals


The sealing performance of any elastic metal seal is based on the relative high specific contact load between the seal and the mating surface …

HTMS - High Tech Metal Seals

Seal Overview

Discover the technical aspects of the different types of seals HTMS designs and produces, be it with internal -, external -, or axial pressure …

HTMS - High Tech Metal Seals

Selection Guide

The selection of the most suitable seal for any service condition is often a delicate trade-off between load and spring back of the seal …


Need Assistance?

You will find a lot of information on our web site and in our Catalogue.
However, do not hesitate to contact HTMS to discuss the ideal sealing solution to suit your needs!

HTMS - High Tech Metal Seals

High Tech Metal Seals
HTMS – Mechelen, Belgium

Standard as well as non-standard designs!

State of the Art

Resilient metal seals often have to perform under extreme conditions. Standard solutions as given in this catalogue may not always suffice these requirements.

In case the application requires seal properties outside the scope of the standard designs, HTMS can develop a seal with the necessary physical properties.

Plating – Coating

With modern state of the art equipment, HTMS provides first class plating and coating services. Our in-house plating facility includes gold, silver, copper, nickel and tin plating.

HTMS also runs a coating facility for applying PTFE as a soft layer on the mating surface of the seal.