Maintenance & Care Guide for Century Truck Caps and Fiberglass Tonneau Covers

Mar 9 2026

Century Truck Caps and Fiberglass Tonneau Covers from LEER.com are designed to provide durability, protection, and a sleek appearance for your truck. Each CENTURY product is finished with premium-grade automotive paint, delivering a high-quality finish that enhances your vehicle's look.
 
With proper maintenance and care, your cap or tonneau can maintain its appearance and performance for years. Below are essential guidelines to help protect the finish, maintain functionality, and extend the life of your Century product.
 
Caring for Your New Paint Finish
 
Your CENTURY truck cap or tonneau cover features a professionally applied automotive finish. Like any freshly painted surface, it requires time to fully cure.
 
First 90 Days: Paint Curing Period
 
During the first 90 days after installation, follow these important precautions:
  • Do not wax or wipe the surface during the curing period.
  • Avoid commercial or high-pressure car washes.
  • Allow the paint finish sufficient time to cure completely.
Following these steps helps ensure the finish hardens properly and maintains a long-lasting shine.
 
Protecting the Paint Surface
 
Proper care prevents scratches, fading, and other damage to the painted fiberglass surface.
 
Best Practices for Paint Care
 
To maintain the finish:
  • Never wipe your cap or tonneau with a dry cloth, which can scratch the surface.
  • Avoid spilling chemicals such as antifreeze or coolant on the paint.
  • Do not scrape ice or snow directly from the surface.
  • Use only polishes specifically formulated for clear-coat finishes.
These precautions help prevent damage and preserve the appearance of the paint.
 
Washing and Waxing Your Century Cap or Tonneau
 
After the initial 90-day curing period, regular cleaning and waxing will keep your product looking like new.
 
Cleaning Tips
 
  • Wash your cap or tonneau regularly with cool water and a mild detergent.
  • Clean the surface in a shaded area to prevent water spots.
  • Use products specifically designed for painted fiberglass surfaces.
 
Your local CENTURY dealer can recommend products designed to protect both fiberglass and aluminum surfaces.
 
Waxing
 
Once the paint has fully cured:
  • Apply a quality wax designed for automotive clear-coat finishes.
  • Wax regularly to protect against UV exposure and environmental contaminants.
 
Window Care and Protection
 
The windows on your CENTURY truck cap are designed for durability but should still be handled with care.
 
Important Window Guidelines
  • Avoid directing high-pressure car wash sprays or pressure washers directly at the windows.
  • High-pressure equipment may force water past seals, which is not covered under warranty.
Gentle washing is the best method for cleaning cap windows.
 
Monthly Maintenance Checklist
 
Routine maintenance helps ensure your Century cap or tonneau continues to operate smoothly.
 
Lubricate Moving Components
 
Once a month, lubricate:
  • Sliding window tracks
  • Door hinges
  • Door locks
  • Window mechanisms
Use an oil-based lubricant for these components.
 
Avoid using silicone or petroleum distillate spray lubricants (such as WD-40) on gas props.
 
Inspect Mounting Hardware
 
Check mounting hardware monthly to ensure everything remains secure.
 
Typical mounting components include:
  • Cap clamps
  • J-clamps
  • Bolts and washers
Caps can also be securely mounted using:
 
  • ¼" Grade #5 bolts
  • 1" washers under the bolt head and bed rail
  • Lock washers under each nut
If you have questions about proper attachment, your CENTURY dealer can assist.
 
Inspect Window and Trim Seals
 
Over time, exposure to weather can cause sealing materials to shrink.
 
Check periodically for:
  • Seal shrinkage
  • Gaps around windows or trim
  • Signs of moisture intrusion
If shrinkage occurs, reseal using a silicone-based sealant.
 
Protecting Fiberglass Surfaces
 
Fiberglass surfaces can gradually weather when exposed to the elements.
 
To keep your cap looking its best:
  • Clean the surface regularly
  • Wax after the initial 90-day curing period
  • Use products designed for painted fiberglass and aluminum protection
Regular care helps maintain the finish and protects against sun, weather, and road contaminants.
 
Professional Service and Support
 
Routine maintenance is simple, but if you prefer professional service, your local CENTURY dealer can perform inspections, adjustments, and maintenance for a nominal fee.
 
Regular dealer maintenance ensures:
  • Proper hardware tightening
  • Functional locks and windows
  • Long-term performance of your truck cap or tonneau.
Final Thoughts
 
Your Century Truck Cap or Fiberglass Tonneau Cover is built to last, but proper care is key to preserving its appearance and functionality. By following recommended maintenance practices, especially during the first 90 days, you can ensure your product remains durable, secure, and visually appealing for years to come.

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