Custom manufacturing example · Custom automotive electrical silicone rubber long grommets

CUSTOM RUBBER & SILICONE MANUFACTURING

Custom automotive electrical silicone rubber long grommets

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

Automotive rubber long grommets extend the protected cable route beyond a short opening liner. Their length should follow the available space without forcing the harness against trim, a bracket or another component. Both ends of the extended section need to remain aligned with the route as the vehicle assembly reaches its finished configuration.

Custom silicone or rubber molding allows the length, passage and locating profile to be adapted to that route. Consider the harness diameter and the space taken by any wrapping or local branch. A long covering should not conceal a bend that is too tight for the cable underneath.

Trial the grommet with the harness in its final clips and the nearby parts installed. Look for compression along the covered length and pulling at the panel interface. If access work later moves the harness, check the grommet again before closing the trim. Keep the cable supported as required by the vehicle design so the extended rubber section protects the route without carrying unintended harness loads.

Material options: Custom silicone or rubber formulation, with dimensions and color adapted to the mating component.
Hardness range: Silicone: 20–80 Shore A; rubber: 30–90 Shore A. Assess the grade against this fit requirement: Keep the cable supported as required by the vehicle design so the extended rubber section protects the route without carrying unintended harness loads.
Custom profile & fit: Consider the harness diameter and the space taken by any wrapping or local branch.
Assembly considerations: Both ends of the extended section need to remain aligned with the route as the vehicle assembly reaches its finished configuration.
Design check: Trial the grommet with the harness in its final clips and the nearby parts installed.

Photos illustrate structure or material only. Custom silicone or rubber molding allows the length, passage and locating profile to be adapted to that route. 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.