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Truck and Trailer

Commercial truck and semi-trailer rubber trim Are you looking for heavy-duty truck parts like a universal fender flare or fender flare trim, drip rail, or trailer door seals? Explore Trim-Lok’s highest quality truck and trailer parts for OEM or aftermarket customers below and let us know if you have questions or custom needs.

A Trusted Rubber Seal Manufacturer for the Trucking Industry

For more than 50 years, Trim-Lok has been a reliable rubber seal manufacturer, supplying the trucking industry with trailer door seals, trailer fender flares, and other commercial truck and semi-trailer parts. In addition to providing the highest quality off-the-shelf products, our experienced engineers and designers consult directly with OEMs to solve complex problems with custom solutions. Our deep expertise and materials knowledge, fast turnaround times, and American-made products ensure that you receive a solution that meets your needs.


Application Benefits 

Our fender flare trim and rubber seals can help you to achieve a variety of application benefits:

  • Protection: Safeguard against road debris, rain, snow and ice to prolong the lifespan of the trailer.
  • Noise and vibration reduction: Improve driving quality through increased comfort.
  • Durability: Withstand wear over long-distance trucking.
  • Appearance: Enhance or customize aesthetics by adding a clean, finished trim.

Bucket Truck & Trailer Door Seals

Bucket trucks and trailer trucks require heavy-duty rubber seals to protect the vehicle and its contents from the elements and aging. As the number-one source for sealing rubber extrusions Rubber-Lok provides custom, easy-install clip seals that fit and protect your truck and trailer.

Aftermarket Fender Flare and Trim

If you need to replace your truck or trailer fender flares or add some trim to seal the gap between your vehicle’s flare and body, explore Trim-Lok’s universal Fender Flare or Fender Flare Trim. Trim-Lok truck and trailer fender flare installs quickly and easily without drilling or bolting.  Fender flare trim will minimize vibrations and gaps while providing an attractive finish.

Cargo Trailer Drip Rail Gutter

Are you looking for a well-fitting drip rail to protect your truck and your head from rain? This custom plastic drip edge adds functionality and style to trucks, trailers, RVs and more. Learn more about drip rails.

Try Before You Buy 

Not sure if an off-the-shelf product is right for you? Request a free sample to see our products firsthand before you place your order.


Trucking Industry FAQs 

+ Can you accommodate custom requests for commercial trucking and trailer-specific rubber seals and fender flare products?

Our team has a wide array of skill sets and deep industry knowledge. We are prepared to solve your unique commercial trucking industry challenges and create efficient experiences. We’ll work closely with you to determine your goals and exact requirements.

What are your capabilities in producing commercial trucking and semi-trailer fender flares and seals?

Trim-Lok has over 50 years of custom product and design capabilities, and our product engineers are experts in trucking-related trailer door seals, drip rails, and trailer fender flares. We work to accommodate your specific commercial trucking needs through a variety of in-depth capabilities:

  • • On-site customer reviews of the problem
  • • Engineering design and development using the latest in 3D CAD software and FEA
  • • Reverse engineering as required
  • • Secondary design processes, such as splicing, coating or notching
  • • State-of-the-art rapid prototyping techniques
  • • Materials, colors and compounds to match customer requirements
  • • Rigorous quality control
  • • On-site fit trials of first articles
Can you provide examples of past projects you have completed for the trucking industry?

Trim-Lok is proud to serve as the go-to rubber seal manufacturer for a wide range of commercial trucking and semi-trailer OEMs. Many of these customers place monthly orders for fender flare trim, drip rails, and rubber seals. We support them with custom solutions when they have a complex challenge to overcome. Learn more about this custom process and our capabilities by exploring how we helped one shuttle bus company create a living hinge seal.


How do you ensure the quality of your semi-trailer rubber extrusions and fender flares?

Customer satisfaction is our number one priority. Our objective is to ship quality and reliable products to all our valued customers. Our goal is to maintain a Quality Management System that meets or exceeds the requirements specified in the ISO 9001:2015 / IATF 16949:2016 Standard.

We are continuously improving the manufacturing process, products and service, without compromising quality, to meet or exceed the expectations of our customers.

Learn more about our quality policy.

Do you offer warranties or guarantees on your trucking industry seals, trims and fender flares?

Trim-Lok, Inc. warrants all products to be free from defects in material and workmanship for a period of ninety (90) days from date of purchase. This warranty does not include damage to products resulting from accident, misuse, improper installation or storage, and unauthorized alterations.

Learn more about our product warranties.

Can you provide information on the lead times for your trailer door seals and fender flares?

Trim-Lok is based in Buena Park, California, with additional manufacturing capabilities in the Midwest at our Elkhart, Indiana location. Both locations help us serve trucking and trailer customers in high-need regions, such as the Pacific northwest, the southeast, and Florida. Customers enjoy shorter lead times and decreased shipment times due to these two convenient locations.

Can you provide information on packaging options for rubber extrusions, trims and seals?

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

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

What are your shipping and delivery options for rubber and plastic extrusion, seal and trim products for commercial trucking and semi-trailer manufacturers?

We provide 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.