UnderCover ArmorFlex Truck Bed Cover

Starting at $1,059.00


The new ArmorFlex hard folding cover is designed to protect your truck bed and its contents while maintaining its strength, style, and durability. Heavy-duty panels are coated with a LINE-X® specialty automotive coating designed to provide advanced protection from dents and scuffs, even in the most extreme environments. The dual-action tailgate seal offers universal tailgate operation, allowing you to close the tailgate with the last panel of the cover-up or down. ArmorFlex is proudly made in the USA and comes backed by a 5-year warranty.

  • Heavy-Duty Panels w/ Premium-Grade LINE-X® Coating
  • Low-Profile Design w/ a Stylish Matte Black Appearance
  • Dual Action Tailgate Seal
  • Automatic Latching Panels
  • Made in the USA


Please feel free to make use of the UnderCover ArmorFlex installation instructions below to assist you with the installation. Upon purchase you’ll receive vehicle specific instructions. However, if you have further questions or need technical assistance, please call one of our knowledgeable installation experts at 866-900-8800.



The UnderCover ArmorFlex carries a 5-year warranty.


Is the ArmorFlex Waterproof?
The ArmorFlex is weather resistant, utilizing rail channels and drain tubes to move water away from the bed. Ultimately, no folding cover is completely waterproof as there are tailgate gaps and other areas that may allow some intrusion.

What is the install time on the ArmorFlex?
The ArmorFlex can usually be installed in about 45 minutes.

Can I drive with the cover in the upright position?
Yes. The ArmorFlex utilizes strut mounts to stabilize the cover while driving.

Will the cover work with a 5th wheel hitch?
Yes. There are two available cover positions while pulling a 5th wheel. Upright and ¾ bed access.

How fast can I drive with the cover in the upright position?
We do not assign a speed rating to the ArmorFlex in the upright position, but it is well equipped to handle legal interstate speeds.

What is the warranty on the ArmorFlex?
5 Years on workmanship, materials, and hardware.

Can I see out the back window with my ArmorFlex fully upright?
No. The cover in the upright position will block view out the back window.

How easily removed is the ArmorFlex cover?
Simply unscrew the two elevator bolts and lift!

How can I get the side seals to lay flat on the ArmorFlex Cover?
After a day or two, direct sunlight will be absorbed and help the seals lay flat.

Do I need to drill into my truck when installing the ArmorFlex?
No. The ArmorFlex utilizes clamps and a no-drill installation.

Does the ArmorFlex work with a standard toolbox?
No. ArmorFlex cannot be installed with a toolbox.

How secure is the ArmorFlex cover?
The ArmorFlex secures your cargo with the help of a tailgate lock. The only access point is the pull cord underneath to open the cover. If your tailgate is locked, your cover is locked.

Where is my ArmorFlex manufactured?
All UnderCover products are proudly made in the USA.

Is the ArmorFlex compatible with my bedliner?
Yes. The ArmorFlex will work with BedRug, spray-ins and any under the rail bed liner. ArmorFlex is also compatible with many aftermarket bed caps.

Interactive Image

Damage Resistance

The ArmorFlex truck bed cover features LINE-X® specialty automotive coating for superior protection against scuffs, dents, and dings even in the harshest of environments.

Matte Black Appearance

The LINE-X® coating provides a stylish matte black finish appearance to your truck bed cover.

Dual Action Tailgate Seal

The dual-action tailgate seal offers universal tailgate operation, allowing you to close the tailgate with the last panel of the cover-up or down.


423 Total
Jim De Boer
5 / 5
16 August 2021
Undercover just keeps getting better
Had the "button" portion of one of the tie down straps broken on arrival. Do not think this is intrical part of the mechanism, but possibly a different packing method needed. Wouldn't have noticed but other strap has the button still attached.
Joshua A.
2021 Ram 2500
5 / 5
9 August 2021
I just had it installed today but as of now I have no complaints. This product looks really good!
George G.
2019 Ram 1500
5 / 5
4 August 2021
Easy to install/ good quality
Dale C M.
2021 GMC Sierra 1500
5 / 5
2 August 2021
Foam could be a little better in packaging, was crushed when received, also one of the brackets that holds the rod when closed was broke. Called customer service and they are sending out two new ones. Other than that Great Tonneau Cover!
Gonzalo C.
2004 Ford F-150
5 / 5
18 July 2021
nice bed cover. I love it
Gary O.
2021 Ram 1500
5 / 5
14 July 2021
Had a similar cover on a 2010 F150. Looking forward to your cover and carrying items in a safe and dry manner.
Timothy P.
2021 GMC Sierra 1500
5 / 5
10 July 2021
This is the 4th undercover tonneau cover I have purchased between my trucks and my sons. We come back because we like the product and it holds up well.
Nicholas S.
2021 Ford F-150
5 / 5
8 July 2021
Great product and clean look!
jesus v.
2021 Ford Ranger
5 / 5
8 July 2021
excellent product looks super nice
Donald B.
2018 Ford F-250 Super Duty
5 / 5
3 July 2021
Excellent product that looks great, easy to operate and it does not leak!