CUSTOM RUBBER & SILICONE MANUFACTURING

Wholesale small rectangular silicone rubber waterproof o rings

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 small rectangular silicone seal needs its corner geometry matched closely to the receiving seat. Limited dimensions can make a folded corner consume a significant part of the available sealing area. Length, width, section and corner radii should therefore be defined together.

Custom material, hardness and color options allow the ring to follow the product. Select the silicone formulation for the actual exposure and assess any waterproofing requirement on the complete joint. The closing arrangement should compress the seal without dragging it sideways.

During fitting, locate the ring evenly rather than stretching the long sides to force the corners into position. Inspect the perimeter before the housing closes and check for any visible section escaping its seat afterward. During maintenance, examine corners directly for cuts or lasting folds that may be hard to see while installed. If one corner repeatedly bunches, review the receiving radius and closure sequence before changing only thickness. A compact seal benefits from a clear locating method that preserves its intended shape through assembly.

Material options
Silicone. Custom formulation and color for the intended contact conditions.
Hardness selection
Silicone: 20–80 Shore A. During fitting, locate the ring evenly rather than stretching the long sides to force the corners into position.
Custom dimensions
A compact seal benefits from a clear locating method that preserves its intended shape through assembly.
Fit & assembly
Inspect the perimeter before the housing closes and check for any visible section escaping its seat afterward.
Use & inspection
During maintenance, examine corners directly for cuts or lasting folds that may be hard to see while installed.

Photos illustrate structure or material only. During fitting, locate the ring evenly rather than stretching the long sides to force the corners into position. 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.

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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].