Custom manufacturing example · Custom waterproof silicone plugs/stoppers for seal hole

CUSTOM RUBBER & SILICONE MANUFACTURING

Custom waterproof silicone plugs/stoppers for seal hole

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

Custom silicone plugs can be shaped for an opening that needs a defined sealing interface. The body, head, and stopping surface should suit the receiving geometry and the conditions in which the closure will be used. For water exposure, the installed contact must be considered around the whole opening.

Identify where water can reach the assembly and how it can collect near the plug. A recessed seat may retain debris or moisture around the head, while an exposed seat may be disturbed during handling. The design should allow the part to reach its intended position and permit a useful seating check afterward. Avoid relying on the visible head to hide an uncertain body fit.

Select the silicone formulation and hardness for the actual exposure, then assess the completed closure under those conditions. Keep the opening surface free from damage and trapped particles before fitting. Following removal, clean and inspect the contact region before reuse. A change to the opening finish, surrounding geometry, or stopper profile should be included when reassessing the sealing arrangement.

Material options: Custom silicone compound; formulation and geometry developed together.
Hardness selection: Silicone options: 20–80 Shore A. Select the silicone formulation and hardness for the actual exposure, then assess the completed closure under those conditions.
Custom geometry: A change to the opening finish, surrounding geometry, or stopper profile should be included when reassessing the sealing arrangement.
Fit evaluation: For water exposure, the installed contact must be considered around the whole opening.
Color & OEM: Custom colors; OEM identification positioned outside closure contact surfaces.

Photos illustrate structure or material appearance only. A change to the opening finish, surrounding geometry, or stopper profile should be included when reassessing the sealing arrangement. 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.