Custom manufacturing example · Custom made HNBR SBR EPDM FKM Gasket

CUSTOM RUBBER & SILICONE MANUFACTURING

Custom made HNBR SBR EPDM FKM Gasket

A custom component for your assembly.

Define the mating surfaces, dimensions and working conditions. ETOL manufactures the part to the agreed design and material.

Factory direct
Made to order
Drawing & sample support

Share the part, its application and your estimated quantity.

Customize the fit, material and finish

Vulcanization workshop illustration with green molding presses and blue collection bins

Material & hardness

Selected for the contact, temperature and movement

Color & finish

Define the visible surfaces and intended color

Shape & dimensions

Develop holes, lips and walls around the mating parts

Mounting & fit

Match the attachment and installation method

Product Overview

An FKM gasket can be customized for a shaped joint, with HNBR, SBR and EPDM available as other material choices within the broader range. These are alternative formulations rather than a single gasket carrying every material's properties. The selected compound should match the substances, temperatures and physical contact at the joint.

Start by defining the gasket's mechanical role. It may need to seal between faces, cushion contact or occupy a shaped gap. The outline and thickness should follow that role, with adequate support under the rubber when the assembly is compressed. A material change cannot compensate for a gasket sitting partly outside its mating surface.

Rubber gaskets can be produced in cut or molded forms depending on their geometry. Choose the process and profile that preserve the intended contact areas, especially around openings and narrow sections.

During installation, keep the gasket flat and free of residue. Inspect the joint after assembly for local extrusion or a displaced edge. If the old gasket shows swelling, cracking or uneven flattening, review both exposure and compression before specifying the replacement. Maintaining a clear material identity is useful when several similar shapes are stored together, because color alone may not distinguish their formulations.

Material options: EPDM / HNBR / FKM / SBR. Custom formulation and color for the intended contact conditions.
Hardness selection: Rubber: 30–90 Shore A. The outline and thickness should follow that role, with adequate support under the rubber when the assembly is compressed.
Custom dimensions: Maintaining a clear material identity is useful when several similar shapes are stored together, because color alone may not distinguish their formulations.
Fit & assembly: Inspect the joint after assembly for local extrusion or a displaced edge.
Use & inspection: If the old gasket shows swelling, cracking or uneven flattening, review both exposure and compression before specifying the replacement.

Photos illustrate structure or material only. The outline and thickness should follow that role, with adequate support under the rubber when the assembly is compressed. ETOL directly manufactures custom-shaped silicone and rubber parts to your requirements.

Choosing a material or hardness? Explore the selection guide →

From part requirements to production

Define the part

Identify key dimensions, mating surfaces and quantity

Review material & tooling

Agree the compound and manufacturing approach

Evaluate the sample

Review the fit and agreed requirements in the assembly

Produce & inspect

Manufacture and check against the approved requirements

Review the intended assembly

Working conditions

Identify temperature, contact fluids and repeated movement.

Material and structure

Consider hardness together with wall thickness and support.

Installation

Check access, mating dimensions and the fitting sequence.

Ordering this custom component

Can the shape be adjusted to my mating parts?

Yes. Show the receiving opening, contact surfaces and clearance limits. We can review the dimensions and retaining features around the intended fit.

Which details should be agreed before tooling?

Agree the critical dimensions, material, hardness, visible surfaces and sample requirements. Explain how the part is installed and which interfaces control its function.

Can a sample help define the replacement?

A sample can help explain the structure. Compare it with the assembly because wear, swelling or compression may have changed its original dimensions.

How is the quotation for this part determined?

The material, part geometry, tooling, quantity and finishing affect the quotation. Include the intended batch size and delivery destination when describing your requirements.

DISCUSS THIS COMPONENT

Describe the part you need.

Share the fit, operating conditions and quantity with our manufacturing team.