Sonderhoff: Solution3 – only your requirements matter
Sonderhoff is the system supplier for polymer sealing and potting systems. Here you get the chemistry specific to your application and dispensing technology tuned to your process, all in the same package – designed and produced by us!
Sonderhoff – Worldwide Turnkey Sealing Solutions
The Sonderhoff system links chemical/technical excellence with creative engineering power in the realm of foam seals, glues and potting.
The knowledge we have gathered as the fruits of over more than 50 years’ hard work, a treasure-trove of more than 1,000 recipes and the innovative energy of an enterprise group active on an international level, are the guarantee for our high level of customer orientation, tailor-made products and market conscious solutions – also in your industry!
Perfect protection
against liquids

Sonderhoff: System 3 = Competence3
As a leading company for customised sealing solutions, Sonderhoff provides its customers with a great depth of patented knowledge and experience from a wide variety of realised applications. Across all levels, on a wide range of materials and geometries. Always of the very best quality. Precisely sealed. So that humidity, dust & co. stay outside. Through the interplay of our well-engineered machine construction concepts and our individually adjustable material formulae, we offer you unique opportunities to optimise your processes.
And we offer you all the accompanying services for your product realisation, from the finishing of prototypes and sample parts, through small production runs right up to continuous volume production.
Chemicals
Chemicals
We design and produce chemical sealing, potting and gluing systems based on PVC, silicone or polyurethane and market them worldwide. Sonderhoff can rely on the experience gained through the creation of over a thousand different formulations.
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Engineering
Engineering
We develop dispensing and automation concepts to your specifications, from the stand-alone system right up to fully automated production lines for foam sealing, gluing and potting.
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Services
Services
We offer the complete range of services, from the production of individual prototypes and pilot or small production runs through to full-scale volume production.
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Perfect protection from
dirt, sand and environmental factors

The first step to a perfect solution.
Every industry has special requirements that have to be met by their partners, day after day, product for product.
The first step towards customer satisfaction is to understand the customer’s requirements. We therefore listen very carefully when a customer is explaining new tasks.
Our systematically acquired knowledge and the creative innovation of our group are your guarantee for optimal customer focus, tailor-made products and market-driven solutions.
Sealing
Sealing
FERMAPOR® K31 and Fermasil® are the brand names of Sonderhoff’s two-component, room-temperature reacting polyurethane or silicone systems for the manufacture of flexible foam seals which are foamed directly onto the part by using FIPFG (formed-in-place foam gasket) technology.
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Gluing
Gluing
FERMAGLUE® is the brand name of Sonderhoff’s two-component room-temperature reacting polyurethane systems for the production of flexible to stiff gluing systems, which serve as the basis for the customer-specific recipe.
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Potting
Potting
FERMADUR® is the brand name of Sonderhoff’s two-component room-temperature-reacting polyurethane systems for the manufacture of hard to gel-like potting compounds which are placed and cured directly on or in the component using FIP (Formed-in-Place) technology.
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Perfect protection from
wind and weather

Internationality
– at home in every market
Over 300 million seals are produced yearly using Sonderhoff products. This takes place in over 50 countries around the globe. Today, we have 255 employees in total worldwide. We have companies in Germany, Austria, Italy, the USA and China, and are represented in all important markets.
Concentrating on core competency
– Sealing foams, adhesion and potting to the highest precision
We are the system-supplier for polymer sealing, gluing and potting solutions based on polyurethane, silicone and PVC. The innovative ideas of many minds – from material development to system manufacture, from automation to job order production – all under the same roof. Definitely the best foundation for implementing your ideas.
More than 50 years’ experience and continuity
– Good things come to those who wait!
2008 marked the 50th anniversary of the day on which a family business came into being, and progressed from being a pioneer to being the leading specialist in the FIPFG (Formed-in-Place Foam Gasket) industry, thanks to persistence, hard work and courage.