CUSTOM RUBBER & SILICONE MANUFACTURING

Custom made heat resistant o ring flat rubber washer

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 washer provides a custom circular layer between mating parts. Its dimensions should match the central opening and supported contact area, with thickness selected for the available compression. A flat section and a round O-ring section require different receiving geometry even when their overall diameters are similar.

For a warm application, choose the compound for the actual temperature and duration of exposure. The medium and cleaning substances also need to be included. A heat-resistant description does not establish a universal operating limit or make one ring profile interchangeable with another.

Inspect the mating surfaces before assembly and place the washer flat without stretching it out of shape. Keep it aligned as the joint closes, avoiding pinched edges near fasteners or shoulders. Evaluate the complete assembly under its intended conditions. During replacement, check for damage or unevenness in the receiving faces and use the correct section and material so the original spacing and sealing arrangement remain as designed.

Material options
Rubber. Custom formulation and color for the intended contact conditions.
Hardness selection
Rubber: 30–90 Shore A. Its dimensions should match the central opening and supported contact area, with thickness selected for the available compression.
Custom dimensions
A flat section and a round O-ring section require different receiving geometry even when their overall diameters are similar.
Fit & assembly
Inspect the mating surfaces before assembly and place the washer flat without stretching it out of shape.
Use & inspection
During replacement, check for damage or unevenness in the receiving faces and use the correct section and material so the original spacing and sealing arrangement remain as designed.

Photos illustrate structure or material only. A flat section and a round O-ring section require different receiving geometry 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].