Custom molded and extruded rubber and plastic parts for industrial components applications – built to your print, or designed with you.
COi Rubber manufactures custom molded and extruded rubber and plastic industrial components across transit, construction, recreation, appliance, power tools, HVAC and heavy equipment. We make it our business to learn your business – providing application, material and assembly assistance – and build to your print, or help design the part from the requirement up.

Below are common rubber and plastic applications our customers source in this industry, and the materials we mold for them. These are engineering considerations, not guarantees of suitability – final selection depends on your drawing, operating environment and testing. Send a drawing or a sample part and we will match the compound, durometer and process to the application.
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Have a question? Use our contact form to receive information regarding your inquiry. You may also give us a call at (626) 965-9966.
Industrial components range from small seals to large bonded assemblies. EPDM serves weather and water exposure, polychloroprene (CR) balances oil and ozone resistance, natural rubber and SBR suit abrasion and cost-driven parts, silicone serves heat, and FKM serves chemical and fuel contact. Process follows the part: molding, extrusion, insert molding or rubber-to-metal bonding.
When you request a part, tell us the temperature range, media or chemical exposure, and expected service life, and include the drawing or a sample part. We match the compound and durometer to that.
The right compound depends on the conditions the part will live in. The points below shape material and geometry choices for industrial applications:
These are engineering considerations to review together at the quoting stage, not guarantees of suitability for a specific application.
We match the process to the part and the volume:
Send a drawing or a sample part and we will recommend the process, tooling approach and compound together.
Every new part goes through first article inspection or a Level 1 PPAP (Production Part Approval Process) before production – Level 3 for automotive, Level 4 for higher-requirement projects. We provide material certifications verified in our own lab against your material requirements, plus a dimensional layout, a bubble blueprint and a signed first article form. Level 3 goes into full industry-standard PPAP documentation depth: design records, process flow, PFMEA, control plan, MSA, capability studies (CPK) and the Part Submission Warrant (PSW). Higher-requirement projects can run customer-defined Level 4 submissions where specified. Our manufacturing facility is IATF 16949 certified, with APQP and 5-Why and fishbone root-cause analysis built into our quality process. Once a part is approved, we hold the compound, durometer and tooling consistent so reorders match the approved part.
A complete RFQ gets a faster, more accurate quote. Include what you can from this list:
Send these to sales@coirubber.com and we will respond with material and process recommendations.
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