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Custom Product and Design Capabilities

A design engineer draws plans for custom rubber seals and custom car trim molding

Custom Trims, Molding and Plastic Seals

As the leading manufacturer for custom rubber seals, plastic trims, molding and more, Trim-Lok is known for precise repeatability. For more than 50 years, we’ve provided customers around the world and across different industries with custom extrusions they depend on. We work to accommodate your specific needs, such as:

  • • On-site customer reviews of the problem
  • • Engineering design and development using the latest in 3D CAD software and FEA
  • • Reverse engineering as required
  • • State-of-the-art rapid prototyping techniques
  • • Materials to match customer requirements
  • • On-site fit trials of first articles

Learn more about Trim-Lok and read how we designed custom edge protection for a large retailer. You can also learn more about Trim-Lok's patented All-in-One Wipe Seal seamless corner installation method.


Our team has a wide array of skill sets and deep industry knowledge. We are prepared to solve your unique challenges and create efficient experiences. We work closely with you to determine your goals and exact requirements and keep these considerations in mind:

  • • How will you use your product?
  • • Do you need a waterproof product?
  • • Do you need color matching or other aesthetic requirements?
  • • Does your product need to withstand high or low temperatures?
  • • Does your product need to be flame resistant or flame retardant?
  • • Will your product encounter corrosives (e.g., oils)?

Answers to these questions help our researchers determine the right material, color and compound for your custom rubber seal or plastic trim. Our engineers may also request CAD drawings from customers to understand how a custom door trim, car molding or rubber seal functions within the design.

Visit Custom Capabilities: Materials & Shapes to learn more about how we can work with you in these areas.

Design Assistance

Our highly skilled, in-house engineering team creates our own drawings with interactive software and technology, working with the latest in:

  • • CAD software
  • • Technology
  • • Design programs
  • • Quality standards

We pair high-caliber designs with excellent materials knowledge and strong manufacturing expertise to ensure our custom products meet your standards for quality, strength, appearance and functionality. Learn what to consider during the design process with our spec sheets and testing data.

Secondary Design Processes for Custom Trims and Seals

Need additional customizations for your extruded rubber seal, plastic trim or custom car molding? Our team looks for every opportunity to provide the unique methods you require, such as:

  • • Mitered corners and frame assemblies
  • • Film splicing
  • • Slip coating
  • • Custom color matching
  • • Notching, holes or special cut outs
  • • O-rings
  • • In-line printing
  • • Injection molded corners
  • • Pressure-sensitive adhesive (PSA) tape backing

We can provide finished parts cut to length or provide reels of extruded stock, depending on the customer’s request. To learn more about our custom capabilities and secondary design offerings, visit page 43 in our catalog.


Utilizing rapid prototyping, we supply a tangible form of your idea and help test and validate aspects of its conceptualization quickly so refinements can be made before manufacturing begins.

Quality Control

Quality doesn’t start after your custom trim or rubber seal is manufactured—it starts with strong management, responsive leadership and investment in our people. Our goal is to maintain a quality management system that meets or exceeds the requirements of IATF 16949 and ISO 9001.

Custom Packaging

Trim-Lok can provide personalized packaging options for your custom trim molding, extruded rubber seals, custom door trims and more. Our custom packaging options include:

  • • Custom boxing
  • • Custom reels
  • • Custom bagging
  • • Header cards for retail
  • • Private label

Value add is a major component of our global, day-to-day service. Explore our additional capabilities to learn more about our custom engineered solutions.


Trim-Lok provides timely and cost-efficient shipping from our West Coast and Midwest manufacturing facilities . Most in-stock materials and products can ship on a same-day or next-day schedule. Ready to get started? Contact a sales representative to request a custom Trim-Lok product today.