CUSTOM RUBBER & SILICONE MANUFACTURING

Square rubber cover and silicone rubber caps

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 square rubber cover should follow the complete perimeter of the component it closes. Custom silicone cap geometry can include the required side dimensions, depth, and corner shape. The cover mouth needs to reach its intended seat without being stretched unevenly across the corners.

Measure the mating end over the engagement depth, including any lip or change in section. A cover can contact the straight sides yet remain lifted where the corner radius differs. Nearby structure should leave enough space for the wall to settle naturally.

Select the compound for the actual temperature and substances at the closure. Fit the cover progressively around the perimeter and inspect each side after seating. Keep a practical handling area accessible if it will be removed during servicing. During care, clean deposits from the corner regions and check for tears or permanent distortion. Replace with the matching internal outline and depth rather than trimming another cap to clear an incompatible edge.

Material options
Custom silicone compound; formulation and geometry developed together.
Hardness selection
Silicone options: 20–80 Shore A. Measure the mating end over the engagement depth, including any lip or change in section.
Custom geometry
Custom silicone cap geometry can include the required side dimensions, depth, and corner shape.
Fit evaluation
Fit the cover progressively around the perimeter and inspect each side after seating.
Color & OEM
Custom colors; OEM identification positioned outside closure contact surfaces.

Photos illustrate structure or material appearance only. Custom silicone cap geometry can include the required side dimensions, depth, and corner shape. 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.

No files selected.

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].