• About us

About us

A true partner for success

DONIT TESNIT d.o.o. is one of the leading gasket, gasket sheet and sealing solution providers. We offer the best solutions for all of your sealing challenges. This is achieved through an understanding of our customers’ needs, our high quality products, extensive know-how in application engineering and customer driven innovation. We are a true partner for your success!

At a glance



A true partner for success

200+ employees dedicates to you


Experienced production and services from 1946

Extensive experience, enriched by deep understanding of clients’ needs and innovation, we have gained throughout the history, enables us to find optimal solutions for our clients’ sealing problems.


Serving all industries

We have experience in even the most demanding of industries and applications:

  • Automotive industry
  • Steam supply industry
  • Water supply industry
  • General purpose usage
  • Petrochemical industry
  • Pipeline systems
  • Gas supply industry
  • Potable water supply
  • Chemical industry
  • Shipbuilding
  • Machine building
  • Refineries
  • Power plants
  • Food industry
  • For heat exchangers, valves, boilers, radiators, pressure regulators, compressors…


4 pillars of service and development

Our customer centric approach is based on experienced production and is supported by four pillars:

  • Strong R&D, with a focus on innovation,
  • Certified quality and service assurance,
  • Excellent application engineering,
  • Training: intensive, interactive and case study driven education programs to our customers.

This enables us to offer one-stop shop for our clients.


Continuously working on strong DONIT® brand position and high customer satisfaction, we will proactively build our business, to achieve higher added value for our customers, employees, community and owners.


We are creating a perfect fit through …

… offering the best sealing products and solutions.
deep understanding of each and every customer.
… extensive knowledge and experience.
… high level of flexibility and innovation.
… commitment to building a long-term partnership with customers and suppliers.

One company – two divisions

To better adapt to the needs of the market and thus achieve greater customer intimacy, we decided to divide our business in two divisions: DONIT® Gasket Sheets and DONIT® Industrial Sealing Solutions (for gaskets and solutions). This enables us to offer complete range of sealing products and solution and at the same time better fulfillment of different customer needs and better adaptability to market demands.

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