Custom Rubber Molding

Where Experience Meets Innovation

Jefferson Rubber Works (JRW) has over 40 years of experience with custom rubber-molding Industry.  We combine that experience with state-of-the-art injection molding technology to deliver customized solutions with unparalleled accuracy.custom rubber molding


While other companies still use outdated compression and transfer molding methods, JRW uses an injection molding process that produces custom rubber molded parts with precision and speed. That’s why we’re a preferred custom rubber molding supplier for OEMs across industries including Automotive, Healthcare, Consumer Products, Liquid Injection Molding, Construction, Hydronics and the U.S. Government.


A One-Stop Solution for Custom Rubber Molding

Jefferson Rubber Works offers a one-stop solution for all of your custom rubber molding needs, no matter how challenging the specifications. Our highly skilled staff can assist you with every step of product development including design, prototyping, production, finishing and assembly. View our product gallery.


Capabilitiescustom rubber molding

  • Custom Rubber Injection Molding
    Injection molding is the process of manufacturing parts by injecting material into a closed mold. It’s most typically used in mass-production processes where the same part is being created thousands or even millions of times in succession. Learn more.
  • Custom Rubber Compression Molding
    Compression rubber molding is the earliest and most simple form of rubber molding. The process is similar to that of making a waffle. A preformed piece of rubber is placed into an open mold cavity and then compressed. This process is best suited to low production volumes of medium to large size parts that use higher cost materials. Learn more.
  • Liquid Silicone Injection Molding
    Liquid silicone injection molding, also known as LIM, is similar to rubber injection molding where the silicone rubber material is forced through an injection nozzle and is injected into the mold cavity and cured under heat and pressure. The process for molding Liquid Silicone Rubber (LSR) is suitable for relatively small parts with high annual volume needs. Learn more.
  • Transfer Molding
    Transfer molding is a simplified method of injection molding with many of the benefits of both injection and compression molding. It facilitates the creation of small, detailed parts with high levels of control. Transfer molding is best suited to low to medium volume production of small to medium sized parts. It’s a flexible solution offering the ability to produce intricate-shaped products and allows for the addition of colored and translucent compounds. Learn more.
  • Composite Molding
    Bonding metal to rubber is usually done in one of two ways. Either through the application of an adhesive (glue) or vulcanization (bonding). Gluing metal to rubber is a secondary, manual process for joining rubber to a metal insert. It is a good solution in specific situations where bonding is not possible because of cost or other practical considerations. Learn more.
  • Thermoplastic Elastomers
    Thermoplastic elastomers (TPE) are a class of copolymers or a physical mix of polymers (usually a plastic and a rubber) that can molded and reused like plastics but have the typical elastic properties of rubbers. The two most important manufacturing methods with TPEs are extrusion and injection molding. TPEs are ideal candidates for design or replacement in a number of different applications. Learn more.
  • Prototyping
    Prototyping is integral to custom rubber part design and development.  It tests ideas quickly for form, fit, and function ensuring that designers and engineers have a clear idea about how a product will perform. A prototype is a simplified model of a proposed solution used to test or validate design assumptions and functionality both quickly and cheaply.  This allows for a level of confidence prior to tooling for production. Learn more.


What is the Custom Rubber Molding Process?

Rubber molding is the process of taking uncured rubber or elastomer and transforming it into a usable product. Many rubber components and products are formed through a molding process during which uncured rubber is subjected to a chemical process that toughens or hardens the polymer chains in the material. The process often introduces heat to reduce curing times. Rubber compression molding, rubber injection molding and rubber transfer molding are the three types of rubber molding processes.


Rubber Molding Materials

There is a wide range of natural and synthetic rubbers available. The most common are:

  • Nitrile or Buna-N
  • Hydrogenated Nitrile
  • Ethylene Propylene Diene Monomer (EPDM)
  • Silicone
  • Fluorosilicone
  • Neoprene
  • Natural Rubber
  • SBR (Styrene butadiene)
  • Fluorocarbon
  • Butyl
  • Urethane


A Commitment to Service & Quality

Jefferson Rubber Works is an ISO9001: 2015 accredited company that has had an ISO certification for several years. It’s part of our dedication to manufacturing quality and defect-free products at competitive prices. Quality management is a cornerstone of our business model with a strong commitment to the process by our staff.   This commitment to quality extends to delivering exceptional customer service and a fuss-free “one stop shop” experience.


About Jefferson Rubber Works

Jefferson Rubber Works is an American owned and operated custom rubber-molding manufacturer.  We are a leading supplier of custom rubber products, with expertise in rubber injection molding, liquid silicone molding, transfer molding, thermoplastic rubber and composite moldings for customers in a wide variety of markets.  Our state-of-the-art custom injection molding processes, combined with the latest equipment and our highly trained staff, ensures we deliver high precision and cost efficient rubber molded parts each and every time.


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