Custom manufacturing example · Molded EPDM NBR rubber soft gaskets/silicone seal O-ring

CUSTOM RUBBER & SILICONE MANUFACTURING

Molded EPDM NBR rubber soft gaskets/silicone seal 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

Softness can help a gasket conform within its intended joint, but it does not remove the need for correct dimensions. Rubber soft gaskets should be selected around the receiving faces and the amount of compression the assembly is designed to apply. A very compliant part can still be displaced or cut if the gap and hardware are unsuitable.

EPDM, NBR and silicone options represent different compound selections. Define the actual fluid, temperature and cleaning conditions before choosing between them. An O-ring profile and a flat gasket section also need their respective receiving geometries rather than an assumption that either can fill the same space.

Keep the selected part aligned during assembly and inspect the edges before the joint closes. Evaluate sealing under the intended conditions. During servicing, look for rubber extruded into a gap or trapped against a sharp feature. Replace the gasket using its designed section and material, and address the receiving condition instead of relying on additional softness to hide an unsuitable fit.

Material options: EPDM / NBR / Silicone. Custom formulation and color for the intended contact conditions.
Hardness selection: Rubber: 30–90 Shore A. Silicone: 20–80 Shore A. Rubber soft gaskets should be selected around the receiving faces and the amount of compression the assembly is designed to apply.
Custom dimensions: An O-ring profile and a flat gasket section also need their respective receiving geometries rather than an assumption that either can fill the same space.
Fit & assembly: Keep the selected part aligned during assembly and inspect the edges before the joint closes.
Use & inspection: Softness can help a gasket conform within its intended joint, but it does not remove the need for correct dimensions.

Photos illustrate structure or material only. An O-ring profile and a flat gasket section also need their respective receiving geometries rather than an assumption that either can fill the same space. 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.