Custom manufacturing example · rectangular rubber plugs epdm rubber silicone cover

CUSTOM RUBBER & SILICONE MANUFACTURING

rectangular rubber plugs epdm rubber silicone cover

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

Rectangular rubber plugs need a close relationship between their corners and the corresponding opening. Length and width are only part of the fit: corner radii, wall thickness, and the shape of the retaining section determine whether the closure can seat evenly. A plug may cover the hole from above while binding at two corners underneath.

Compare the actual profile with the cutout and the space behind it. Check whether the head or flange has clearance around nearby features and whether the inserted section can reach its intended depth. EPDM and silicone options should be selected for the relevant exposure rather than treated as equivalent because they share a rectangular shape.

Fit without forcing a raised corner down over an incompatible edge. Inspect the perimeter for rolled material and uneven contact. Any sealing requirement must be evaluated with the chosen formulation and complete mating joint. During repeated removal, watch for corner tears or a distorted retaining section, since those local defects can affect engagement before the broad visible face appears substantially worn.

Material options: Custom silicone or EPDM formulation; select the compound alongside the mating geometry.
Hardness selection: Silicone: 20–80 Shore A; solid rubber: 30–90 Shore A. Inspect the perimeter for rolled material and uneven contact.
Custom geometry: Length and width are only part of the fit: corner radii, wall thickness, and the shape of the retaining section determine whether the closure can seat evenly.
Fit evaluation: Compare the actual profile with the cutout and the space behind it.
Color & OEM: Custom colors; OEM identification positioned outside closure contact surfaces.

Photos illustrate structure or material appearance only. Length and width are only part of the fit: corner radii, wall thickness, and the shape of the retaining section determine whether the closure can seat evenly. 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.