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UnderCover Flex Tonneau Cover Flex Tonneau Cover - FX21019

269 Reviews
$1,119.00
List Price
$969.00
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See Details
Select your vehicle:
Features:
  • Part #: FX21019
In Stock - Ships between 09/27/2022 - 10/04/2022
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Product Info
Features:
  • Flex your truck’s cargo-covering muscle with the Undercover Flex Tonneau Cover
  • Built tough from fiberglass-reinforced polymer (FRP) and an aluminum top skin panel to keep weather and would-be thieves out
  • Advanced fiberglass panels with reinforced polymer material produce a subtle textured finish
  • Three secure driving positions allow for more hauling versatility and 100% access
  • Special prop rods let you flip this truck bed cover completely open and secure in place
  • Easy-to-use slam latches allow you to open the cover from either side of the truck
  • Panels are connected with a seamless, leak-proof rubber seal to lock out moisture
  • Hinges and panels won’t crack, warp, fade, rust or corrode in extreme weather
  • Integrated drain tubes whisk any accumulating water away from your carg
  • Flush-fit design can’t be opened when the tailgate is locked, providing added security
  • Hard top surface supports up to 300 lbs of evenly distributed weight
  • Fully compatible with under-the-rail bedliners, spray-in bedliners, snug-fitting bed rails and tailgate caps
  • Simple clamp-on system allows for easy, no-drill installation and removal
  • Your Undercover Flex Tonneau Cover is crafted right here in the USA and backed by a 3-year warranty
  • Click to View Undercover Folding Tonneau Cover Comparison Guide (PDF)
  • The Undercover Flex features a textured glossy finish on its exterior panels. If you are looking for a premium matte finish instead, try the Undercover Ultra Flex
Description:

The whole reason why drive our trucks in the first place is because we like options. Fortunately, that’s where the Undercover Flex Tonneau Cover excels. It’s not only sleek and sturdy, but it folds back to allow full bed access faster than you could say, "How do I get off this balance beam?"

When it comes to having an efficient hauling setup, innovation is always welcome. Featuring three folding panels, the Flex folding tonneau cover offers three secure driving positions and full bed access. A unique strut system allows the cover to store vertically, opening the entire truck bed up for all sorts of hauling heyday. It’s made from fiberglass with a dual-action tailgate seal and a flush-fitting design, so it’s (almost) as secure as a bank vault and crazy watertight. A rubber seal runs the length of the cover, and a clever drainage system ensures your truck bed will never be mistaken for an above-ground pool.

Crafted from a fiberglass reinforced polymer and rigid aluminum with a subtle textured finish, the Flex folding tonneau cover can shoulder up to 300 (evenly distributed) pounds on top. And, like a Beverly Hills face, it'll never crack, warp, fade, rust or corrode. This stout truck bed cover keeps your bed clean, dry and secure – that’s called a triple threat. The simple clamp system makes it easy to install and remove with no drilling required. Best of all, Undercover backs your Flex Tonneau Cover with a solid 3-year warranty.

The Undercover Flex truck bed cover features a textured glossy finish on its exterior panels. If you are looking for a premium matte finish instead, try the Undercover Ultra Flex.

Click to view the Undercover Folding Tonneau Cover Comparison Guide (PDF)



Frequently Asked Questions

How secure is the Undercover Flex Tonneau Cover?
The cover panels are made from fiberglass reinforced material which is stout and heavy duty. It would require a lot of force and dedication to puncture the surface. Out of sight, out of mind is key. Covering your gear severly limits someone's interest in what may or may not be in the truck bed. As long as your tailgate is locked, the cover is relatively secure.

Is the Undercover Flex waterproof?
Ultimately no truck bed cover is totally waterproof, unless it's a fully overlapping style. Most hard folding covers do a pretty good job keeping major water out, but their joint sections can allow minor water ingress under extreme weather conditions.

Where is the Flex bed cover made?
Flex tonneau covers are made in the USA.

Can I put cargo on top of the Flex truck bed cover?
Yes, putting cargo on top of the tonneau is possible. Absolute maximum capacity is 300 lbs of evenly distributed weight on the Flex. For even greater capacity, consider the Ultra Flex.

How do I lock the Flex if my truck doesn't have a tailgate lock?
Pop & Lock Tailgate Locks are available for most trucks as an aftermarket solution that can be retrofitted if your truck was not originally equipped with a tailgate lock. Sold separately, available at AutoAnything.

Notes:
  • The tailgate lock on the truck is what secures the bed. If your truck does not have a tailgate lock, the cover may be opened by opening the tailgate. Tailgate locks sold seperately
  • ATTN: State of California Consumers
    warning symbolWARNING: Cancer and Reproductive Harm (www.p65warnings.ca.gov)
Manufacturer Info
Return Information

Customer Reviews

Average Rating
Appearance
Ease of Installation
Price/Value
Quality
269 Customer Reviews
5 Star
209 (78%)
4 Star
45 (17%)
3 Star
7 (3%)
2 Star
5 (2%)
1 Star
3 (1%)

Looks great!

Perfect fit on my 2019 F150. Easy to install and only took 15 minutes.
Appearance
Ease of Installation
Price/Value
Quality
Posted By Jim G (Carmel , IN ) / May 13, 2019
2019 Ford F-150
Yes
No

UnderCover Flex Tonneau Cover

Cover is perfect for what I need. so easy to use.
Appearance
Ease of Installation
Price/Value
Quality
Posted By John K (MENOMINEE, MI) / May 9, 2018
2018 Ford F-150
Yes
No

Fantastic product

The cover was simple to install, it works as advertised, and fit perfectly. It is one of the best gifts I have ever given myself.
Appearance
Ease of Installation
Price/Value
Quality
Posted By John R (Valrico, FL) / November 30, 2017
2015 Ford F-150
Yes
No

Good cover but not perfect rain resistance

The back corners do not seal up well so water gets in there. I will try to fill in the open space with some weather stripping. I think it's a good value, though. I was expecting a hand actuated pivoting lock for the first (closest to cab) section of the cover but it was a tension cable like the other two hinges. that was disappointing but not a deal breaker.
Appearance
Ease of Installation
Price/Value
Quality
Posted By Reid G (SALEM, VA) / June 16, 2017
2015 Ford F-150
Yes
No

Undercover Flex Review

Overall good cover, Happy with it so far. Is a pain to drill holes for water tubes.
Posted By Stephen G (Islip, NY) / March 16, 2017
2016 Ford F-150
Yes
No

Flex Tonneau Cover

The cover came to me in 7 days. It was easy to install in 1 hour by myself. I watched a youtube video and did it myself. The rail even is marked were to put the clamps. It performed just as advertised.
Posted By CHARLIE W (Jacksonville, FL) / March 11, 2017
2015 Ford F-150
Yes
No

EXTREMELY PLEASED!

I agree with other's that an extra set of hands would be recommended, however I found a clamp worked ok. Directions for attaching the front part to the bed (directly under the back window) was not as clear as I think it could've been...had to call tech support....but that onlytook maybe 1 minute...counting from when i dialed the number until my question was answered!!!! I highly recommend this cover!
Posted By Keith K (Durant , OK ) / January 26, 2017
2016 Ford F-150
Yes
No

Undercover flex

Great fit and easy installation.
Posted By Omar C (Rogers, AR) / December 13, 2016
2016 Ford F-150
Yes
No

Great fit and easy install

install took minutes with the use of 1 wrench and the fit was awesome
Posted By MATTHEW M (Kailua, HI) / September 7, 2016
2016 Ford F-150
Yes
No

Love it!

Simple install, lightweight, and keeps your stuff dry! It only took me about an hour and a half or so to install. Worth every penny!
Posted By Ricky G (LOGANVILLE, GA) / July 30, 2016
2016 Ford F-150
Yes
No

undercover flex

I had a bak flip on my last truck and didn't like the when fully opened it layed against the back of the truck.The flex stays straight up and never touches the truck. also like the mounting better.
Posted By Frank L (SEBASTIAN, FL) / July 13, 2016
2016 Ford F-150
Yes
No

Easy to Install

The entire process was went very good, from ordering, getting a nice extra discount price with no tax, and then the install was very quick. There is a utube video that can be pulled up that shows the entire install. I did have to make a minor adjustment to get the overall fit right, but the installer will figure that out. I am very pleased at this point.
Posted By Ricky S (Harker Heights, TX) / November 11, 2015
2015 Ford F-150
Yes
No

Undercover Flex, excellent

Just installed the Undercover Flex on my new 2015 F-150 Platinum and it looks great. Truck has not been in a down pour yet, but stayed dry through three days of light rain. Easy to fold up and really simple to install...accomplished in 30 minutes by myself. AutoAnything was a pleasure to do business with.
Posted By Marty T (COCHRAN, GA) / September 30, 2015
2015 Ford F-150
Yes
No

I love it!

This Undercover Flex was very easy to install. Having never installed one before, it took me 15 minutes. Had to adjust it once in that time so it was squared. It isn't completely water tight as some complain about, but it keeps the rain out as it should. Don't store fine art canvases under it and you'll be fine. I love it, the look, the ease of access (yes, you have to close your tailgate before you close it as others have also complained about, that's how it's secure, duh!). 5 Stars!
Posted By Michael S (BRIGHTON, CO) / September 9, 2015
2016 Chevy Silverado
Yes
No

Looks great, works well

I would give this 4.5 starts if I could. The only reason I can't give it a 5 is because of a small water leak. I purchased this to use with an Adarac truck rack and it works well if you're careful with the installation. The rails for the rack must be mounted nearly as far toward the tailgate as possible so the cover can open, and the prop rods need to be adjusted so the open/vertical position isn't perfectly upright and rubbing on the front rack posts.
Posted By Christopher W (Ferdinand, IN) / August 22, 2015
2015 Ford F-150
Yes
No

Mostly as expected

The cover seems well made and Internet videos were very helpful in installation. Instructions and even company sponsored videos were not correct for best install however. They all indicated that the rails should be flush to 1/8 inch above the bed rails but they need to be below the bed rails to actually sit right on the bed. Would have saved a second install had that been clear up front. Hope to get a long life out of the product. Autoanything is the best and will return for future accessories
Posted By Brian R (WILSON, NC) / June 27, 2015
2015 Ford F-150
Yes
No

Great Cover!

This cover was easy to install on my 2015 F-150, probably took 20 minutes to do by myself. The look is outstanding, very flush and seamless looking. It operates very smoothly, I like the cable pull system for releasing the latches. Works easily from either side and while operating by reaching over the truck bed sides. I have had this for several weeks now and probably 3-4 car washes and it appears to be completely waterproof to me. No signs of water inside the bed. Highly Recommend.
Posted By Chris M (GRANGER, IN) / June 23, 2015
2015 Ford F-150
Yes
No

2015 F150 Undercover Flex

Nice looking tonneau cover. Great features, easy install and it appears to be durable.
Posted By WILLIAM B (Levittown, NY) / May 8, 2015
2015 Ford F-150
Yes
No
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