Static seals made to measure
We are a seal manufacturer for custom static special seals, which are manufactured 100% % to your specifications. With our own toolmaking facility, we produce your seals and advise you on selecting the appropriate rubber compound if required.
- Customised production
- Batch sizes 1 to 1 million units.
- Express production from 2 weeks
- 100% Reliability & proactivity
Static Rubber seals - custom-made by the manufacturer
Static seals seal two components against each other where no relative movement takes place. They can be used as Rubber moulding, Silicone moulding or TPE moulded part and are manufactured to prevent the escape of liquids or gases at stationary seals, for example between housings, flanges or covers. Sealing is achieved by compressing an elastomer, which conforms to the surfaces and compensates for irregularities.
As a gasket manufacturer, we also produce dynamic linear seals and rotary seals to customer specifications. Please contact us for a consultation on the right sealing solution for your application.
Circulating frame seal for large housing openings against dust and moisture.
Sealing frame
Individually designed O-rings for specific installation spaces, media and temperature ranges.
Bespoke O-rings
Ring-shaped sealing element for sealing concentric components and bushings.
Sealing ring
Ensures contact pressure, compensates for tolerances via surface seals.
Sealing strip
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Structure of static seals
Every custom-made seal is precisely tailored to your application. To achieve this, various parameters are available for geometric variations. There is often more than one way to install a rubber seal. If required, we, as manufacturers of static seals with over 35 years of experience, will be happy to advise you on the design of your rubber seal.
Geometric shape
Seals can be produced as endless cords, which are then adapted to the appropriate contour or are shaped during the sealing production. This allows for O-rings, seal frames, as well as flat seals on, for example, housing covers, as a rubber-plastic composite or in a rubber-metal composite.
Sealing contour
The seal contour describes the geometry of the sealing surface, which is responsible for the actual sealing. It determines how the seal deforms under assembly pressure and conforms to the mating surface. Typical forms include flat, profiled (V-contour, X-contour, lamellae).
or lip-like contours which generate a defined contact pressure. An optimised seal contour ensures uniform surface pressure, compensates for tolerances and minimises leakage paths.
Assembly integration
Static seals can be integrated into an assembly in various ways. Assembly options include pressing, bonding, insertion (in grooves), and for larger components with suitable inserts, screwing or riveting. However, the most secure connection is achieved by vulcanising the seal directly onto the adjacent component.
O-Ring Geometry
The O-ring has a round cross-section and is the best-known geometry for static seals. It reliably seals between two components when it is lightly compressed in a groove. Its use is typical in housings, screw connections, lids, flanges, and general mechanical engineering applications.
Rectangle Geometry
This seal has a rectangular cross-section and offers a larger contact area than an O-ring. It is often used where high surface pressures or clearly defined installation spaces are required. Typical applications include flange connections, covers, housing seals, and static seals in technical apparatus.
X-Profile Geometry
The X-profile has a cross-shaped cross-section with four sealing lips. This provides multiple sealing lines and can behave more stably in the groove than a classic O-ring. It is often used when improved sealing or increased security against twisting is desired, for example, in precise housing seals, valves, or high-quality static sealing points.
D-Profile Geometry
The D-profile has a flat side and a rounded sealing side, allowing it to adapt well to mating surfaces. It is often used when tolerances need to be compensated or larger gaps need to be reliably sealed. Typical applications include housings, doors, hatches, covers, and static seals in mechanical and plant engineering.
Profile
The profile of the rubber seal can take on several forms. The most widely used profile is the round profile, as used in O-rings. However, other profiles such as X, V, or D-shaped, rectangular, flat, and undercut seal profiles are also possible. Each profile has its own specific characteristics, which we adapt directly to the installation situation.
Elastomers for your static seals
We are a supplier of custom static seals that fit your target application precisely. Therefore, you can freely determine not only the geometry, but also the material from all common elastomers, as well as the Shore hardness select. This allows us to tailor your special seal precisely to your target application and find the right material selection together.
We are happy to advise you on choosing the right material for your static seal!
Sectors / Applications of static seals
Static seals are often manufactured to measure in industry, as individual requirements must be met depending on the installation situation, medium, pressure conditions, temperature range, and geometry. As a manufacturer of static seals, we produce components for a wide variety of applications – from robust seals in mechanical engineering to precise solutions for technical and safety-related systems.
Static Seals in the Electrical engineering
Applications of static rubber seals in electronics include housing seals for control units, sensors, connectors, control cabinets, or industrial PCs. Elastomeric seals are often designed to offer defined IP protection classes such as IP66 to IP69. In addition to the sealing function, properties such as temperature resistance, ageing stability, and electrical insulation of the static seal also play an important role.
Static seals Mechanical Engineering
Static rubber and silicone seals are frequently used in mechanical engineering to seal gear housings, pump covers, or hydraulic manifold plates. A typical application is the seal between a hydraulic block and a valve plate, preventing hydraulic oil leaks at pressures of several hundred bar. Compressor housings, coolant circuits, or flange connections in conveying systems are also reliably sealed with moulded seals or O-rings.
Static Seals in the Railway technology
Custom static seals are used in housings for door controls, brake valves, and electrical control boxes, among other applications. Bespoke seals are employed, for instance, as circumferential seals for the outer housing of door control electronics, reliably keeping out moisture, dust, and salt. Housing covers for pneumatic valve modules or connectors located under the undercarriage are also sealed with rubber gaskets to ensure operational reliability during strong vibrations and temperature fluctuations.
We manufacture your static seal! Test One!
- Toolmaking is our core competency
- 100% in-house expertise
- Fast response times for tooling modifications
Insights in static sealing projects
of our customers.
Improving an enclosure connection with a special seal
The challenge
A customer from the device manufacturing sector was experiencing issues with a screwed housing connection that was suffering from a leak. The standard seal used was unable to adequately compensate for the tolerances of the contact surface. As a result, leakages repeatedly occurred due to the influence of moisture and temperature fluctuations.
Implementation
We analysed the installation situation, surface pressure, and ambient conditions together with the customer. Subsequently, the geometry of the static seal was adapted to compensate for unevenness more effectively and achieve more uniform sealing. Additionally, we selected an elastomeric material that was better suited for the temperature load and the required media contact.
Solution
With the adapted geometry and tuned material, the sealing effect of the housing connection could be significantly improved. The connection remained permanently sealed, the assembly process became more stable, and the customer received a reliable solution for their application.
Do you have questions about static seals?
We have answers!
What is the difference between static and dynamic seals?
Static seals are primarily designed for compression, surface pressure, and media resistance, as there is no relative movement between the components (flange, housing, or cover connections). Dynamic seals for rotating shafts or linearly guided pistons must additionally contend with friction, wear, pressure fluctuations, and temperature development. Consequently, material selection, surface requirements, lubrication, and the geometry of the sealing lips differ. As a manufacturer of static seals, we develop seals for both application areas – with optimised elastomers, geometries, and tolerances.
What is the maximum pressure for static seals?
The permissible compressive load on static seals depends on several factors such as material, geometry, gap dimension, and surface pressure. Static rubber seals can seal pressures of several hundred bar if designed appropriately. To achieve this, extrusion and gap widening must be prevented, for example, through suitable groove geometries or support rings.
What test methods are there for static seals?
Suppliers use various testing methods for static seals to ensure sealing performance, material quality, and long-term durability. Typical tests include pressure and leak tests with air or liquids, compression and compression set tests to evaluate elastic properties, and aging and media resistance tests. Additionally, material properties such as hardness (Shore A), tensile strength, and compression set are tested.
What role does the geometry of a static seal play in its sealing performance?
The geometry of a static seal significantly determines the contact area, compression behaviour, and pressure distribution between the components to be sealed. Different profiles - such as O-rings, rectangular seals, or custom mouldings - create various pressure zones and thus influence the sealing effect. Details such as sealing lips, grooves, radii, or support areas can also improve sealing performance, compensate for tolerances, or prevent extrusion.
How can static seals be integrated into assemblies?
Static seals can be integrated into assemblies in different ways depending on the geometry, assembly process, and sealing requirements. Frequently, fixation is achieved by a clamping or press fit, where the seal is positioned in a groove and compressed during screwing. Alternatively, form-fitting connections, such as via undercuts or special profile geometries, are possible. For permanent connections, vulcanisation directly onto metal or plastic, as well as bonding, are used. In certain applications, snap-fit or latching geometries also enable quick and secure assembly without additional fastening elements.
