Custom manufacturing example · Custom waterproof silicone rubber plugs/stoppers with hole

CUSTOM RUBBER & SILICONE MANUFACTURING

Custom waterproof silicone rubber plugs/stoppers with 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

Stoppers with hole designs combine a fitted outer closure with a passage through the center. The opening can be customized for the component that must pass through it, while the stopper body is shaped for the receiving bore or neck. This arrangement is useful when an opening needs to be closed around a tube or similar inserted part rather than blanked completely.

Two fits need to work together. The outside must seat correctly in the receiving opening, and the central hole must match the inserted component at its contact area. Too much interference at the center can distort the outer surface; too little can leave a path around the tube. Establish the insertion depth of both parts and the clearance beyond the stopper before assembly.

Plan the sequence if the inserted component has an enlarged end. It may need to pass through the stopper before the outer body is seated. Keep both surfaces clean and avoid dragging the rubber over sharp edges. After fitting, inspect the stopper with the tube in its final position, including any side load from its route. Water resistance depends on this complete arrangement and the actual exposure conditions, so assess the assembled interfaces together. A central hole should be molded for the intended use rather than improvised in an unrelated solid plug.

Material options: Custom silicone compound; formulation and geometry developed together.
Hardness selection: Silicone options: 20–80 Shore A. The outside must seat correctly in the receiving opening, and the central hole must match the inserted component at its contact area.
Custom geometry: Establish the insertion depth of both parts and the clearance beyond the stopper before assembly.
Fit evaluation: After fitting, inspect the stopper with the tube in its final position, including any side load from its route.
Color & OEM: Custom colors; OEM identification positioned outside closure contact surfaces.

Photos illustrate structure or material appearance only. The outside must seat correctly in the receiving opening, and the central hole must match the inserted component at its contact area. 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.