Our Company

Fermit GmbH, formerly Nissen & Volk GmbH, has been a specialist in thread sealing for over 100 years and, with its Neo-Fermit brand, is the undisputed market leader in Germany.

As a manufacturer, service provider, and expert partner for wholesalers in the fields of plumbing and heating systems, stove and fireplace builders, technical suppliers, and pool technology, Fermit offers solutions and added value “Made in Germany”.

From master craftsmen to journeymen to DIY enthusiasts, hundreds of thousands of customers trust the company’s certified and approved products.

As an independent subsidiary of the French BARTHELEMY Group, Fermit GmbH also benefits from significantly expanded research and development expertise, as well as a strengthened presence in neighboring European countries.

As a manufacturing company, Fermit GmbH is aware of its role within the entire ecosystem. The photovoltaic system on the roof of the production hall extension, built in 2015, generates 48,700 kWh of electricity, resulting in savings of over 33 tons of CO2 per year. Fermit therefore operates largely climate-neutral, benefiting both people and nature.

In addition, Fermit GmbH undergoes regular quality management audits and is certified according to DIN ISO 9001:2015.

Innovative strength, flexibility, and quick response times. That is Fermit.