Caplugs Automotive
Product Protection and Custom Engineered Solutions

Caplugs Custom Automotive Solutions

As a preferred supplier to the automotive industry for over 70 years, Caplugs understands the demands and processes needed to be a molding partner. Certified to meet IATF 16949, we have PAPP processes and protocols in place to produce a custom part for your next project.

Caplugs has a team dedicated to developing custom solutions and a process to move the project efficiently from concept and prototyping to production and shipment. With six different molding processes and an in-house tool room, we offer complete control over the project, ensuring speed, accuracy, quality, consistency and delivery you can count on.

If you don't see what you're looking for, contact our team of experts. In addition to our custom capabilities, we have an interchangeable mold system and thousands of molds not represented in our catalog. When you start your project with Caplugs, you are assured we will solve your challenge with either a catalog part, a modified part or a full custom solution.

Steering and Suspension

  • Rod covers
  • Ball joint caps
  • Shock tower caps
  • Bleeder valve caps and plugs
  • Stabilizer bushings
  • Suspension spring seals
  • Masking parts for brake assemblies


  • Ultrabake™ caps, plugs, tapes and die-cuts for process temperatures up to 600°F (315°C)

Fuel System

  • Heat shields, O-rings and caps and plugs to fit SAE fuel lines and quick connects

HVAC and Thermal Units

  • Block and condenser caps, thermal

Body and Chassis

  • Body plugs, overslam bumpers and front and rear exhaust heat shields for vehicles

Electrical System

  • Distribution coil boots
  • Spark plug boots
  • Fuse box covers
  • Electrical connector protection

Engine and Powertrain

  • Shift caps
  • Driveshaft protection
  • Housing covers
  • Transmission boots
  • Seals
  • Bushings
  • Caps and plugs

Interior and Exterior

  • Grommets, gaskets, bumpers, dampeners for small motors
  • Button and body plugs for doors, undercarriages, body panels, access panels and other open ports