CUSTOM RUBBER & SILICONE MANUFACTURING

Customized colorful various FKM flat rubber o ring

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

A flat rubber O ring needs to match the receiving joint's intended section. A flat ring and a conventional round-section O-ring can occupy different groove geometries, even when their overall diameters are similar. Define the actual cross-section before choosing the part.

For a Viton or FKM option, select the formulation around the sealed medium and operating conditions. Custom colors can help distinguish configurations, but color alone should not be used as proof of material identity or suitability. The dimensions and compound need to remain associated with the intended application.

Check that the flat section sits on its designed faces without a twist or folded edge. Evaluate sealing with the complete joint rather than assuming performance from the material family. During replacement, preserve the specified thickness and contact width. A used ring that has deformed can make an approximate replacement appear correct, so compare against the intended new-part geometry rather than the worn outline alone.

Material options
FKM. Custom formulation and color for the intended contact conditions.
Hardness selection
Rubber: 30–90 Shore A. Choose firmness around the actual groove and flat ring section; equal diameters do not imply equal compression for different cross-sections.
Custom dimensions
Check that the flat section sits on its designed faces without a twist or folded edge.
Fit & assembly
Custom colors can help distinguish configurations, but color alone should not be used as proof of material identity or suitability.
Use & inspection
A used ring that has deformed can make an approximate replacement appear correct, so compare against the intended new-part geometry rather than the worn outline alone.

Photos illustrate structure or material only. A flat ring and a conventional round-section O-ring can occupy different groove geometries, even when their overall diameters are similar. 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

01

Define the part

Identify key dimensions, mating surfaces and quantity

02

Review material & tooling

Agree the compound and manufacturing approach

03

Evaluate the sample

Review the fit and agreed requirements in the assembly

04

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.

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Send your requirements
and selected drawings

All files and photos you share with us are handled under strict confidentiality procedures and will not be disclosed to any third party.

DISCUSS THIS COMPONENT

Request a Custom Quote

You can also email us directly at [email protected].