Profile seals – the basis of many technical sealing systems

What are profile seals?

Profile seals are sealing elements whose cross-sectional shape is precisely matched to their intended application. They are made of elastic materials that adapt to adjacent surfaces, ensuring a permanent seal against liquids, gases, dust, or noise. The term „profile“ refers to the specific cross-section of the seal body, which is manufactured in various shapes (e.g., H, U, D, P, or L profiles).

Depending on the material, classic Molded Rubber equally questionable as temperature or media resistant Molded Silicone. Where increased dimensional stability or compressive strength is required, profile seals are used as Fabric Composite Parts with integrated textile carriers. Furthermore, profile seals with metal inserts can be Metal Composite Parts achieved when maximum dimensional stability and mechanical load capacity are required.

Typical manufacturing processes are

Extrusionfor endless sealing profiles with constant cross-section
Mould vulcanisationfor circumferential seals with complex geometries

Profile seals are individually adapted to the installation situation and environmental media and influences. They are versatile and form the basis of many technical sealing systems in industry, vehicle construction, and housing technology.

What are the functions and applications of profile seals?

Profile gaskets fulfil a variety of tasks that go beyond mere sealing. They protect systems, compensate for tolerances and improve the acoustic and thermal properties of assemblies:

SealingReliable protection against liquids, gases, dust and other environmental influences
DampingAbsorption and reduction of vibrations and noise
CompensationCompensation of manufacturing tolerances or component movements
Protective function: covers sharp edges, protects sensitive surfaces
Insulation: thermal and electrical separation of assemblies

Typical applications:

Mechanical and plant engineering: Seals For housings, doors, covers and maintenance flaps
Vehicle technology: door, boot and engine seals, sealing profiles in the body and interior
Construction industry: window and façade seals, connection profiles for glass and metal constructions
Electronics and housing technology: circumferential seals in control boxes and switch cabinets
Medical and food technology: Silicone profiles for hygienic seals
Energy and environmental technology: Sealing in solar modules, air conditioning systems and filter housings

Thanks to their geometric and material adaptability, profile gaskets can be used universally and make a significant contribution to the tightness, durability and functional reliability of technical systems.

What components and materials are available for profile seals?

The selection of the right material depends on the ambient conditions, the media acting on it and the mechanical requirements. Depending on the application, profile seals must be flexible, age-resistant and resistant to media without losing their elasticity over their service life.

Typical materials:

EPDMVery good resistance to weathering, ozone and ageing; ideal for outdoor applications, window and door seals
NBRoil and fuel resistant; suitable for technical devices and machines
Siliconehigh temperature resistance (-60 °C to +200 °C) and purity; ideal for food, medical and electronics applications
TPE (thermoplastic elastomers): flexible, recyclable, can be combined with plastic carriers; often in 2-component profiles
CRflame-retardant, weather-resistant, for outdoor and building technology
FKMHigh chemical and thermal resistance for demanding industrial environments