UnderCover is a reputable manufacturer of tonneau covers and other vehicle accessories.
It has a wide variety of tonneau covers, ranging from one-piece covers to high-end hard folding ones.
All of them are engineered to keep your gear secure and free from effects of the elements..
Their performance is outstanding and so are their features. The two covers share a lot of features but are also different in some ways.
To help you choose the right one for you, we will discuss some of the differences as well as the similarities.
Below is the summary of the comparison between the two, highlighting the differentiating features.
- Construction and top material
- Strength and weight capacity
- Under panel material
- Water resistance
- Dual-action tailgate
- Compatibility with other accessories
- Included accessories
- Installation and removal
- Made in the USA
- Which one is for you?
|Features||UnderCover Flex||UnderCover Ultra Flex|
|Material||Fiberglass Reinforced panels||Aluminum panels|
|Under Panel Material||Textured fiberglass-reinforced polymer||Carpeted under panel|
|Finish||High gloss||Matte black finish|
|Profile||Low profile||Ultra-low profile|
|Weight capacity||300 lb evenly distributed weight||400 lb evenly distributed weight|
|UV resistance||Standard UV resistance||Premium UV resistance|
|Dent/scratch resistance||Top dent and scratch resistance||Standard dent and scratch resistance|
|Additional accessories||None||Factory LED light strip|
|Tailgate closing position||With cover open only||With cover open or cloased|
|Warranty||3-year warranty||5-year warranty|
|Check Price||Check Price|
Breakdown of Differences
Construction and top material
Each of the materials has its benefits. The fiberglass material, for instance, is very lightweight and sleek with a glossy finish. This will create a classy and attractive look and feel on your truck.
The aluminum panels are not as lightweight, but they are very strong and durable with an impact resistance property. Ultra Flex has a matte black finish which gives it a cool and stylish appearance.
Durability and resistance
The fiberglass material is very resistant to scratches and dents.
This is one of the main features that attract people to the material as it helps reduce color fading in the sun.
Additionally, it has a standard UV-resistance property that keeps it safe from fading and other UV-related problems.
This enables it to survive the harmful effects of the UV rays better, allowing it to maintain its color.
Unlike most metals, these aluminum panels are corrosion-resistant, and this is emphasized by the extra coating.
The only issue is, after a while, you might notice a few scratches and dents on the aluminum material on Ultra Flex. But this is never enough to compromise the looks.
The Ultra Flex’s aluminum construction is also distortion resistant which gives it longer durability. While the fiberglass material is also very durable, its resistance to distortion does not measure up to the aluminum’s.
Both UnderCover Ultra Flex and Flex have high resistance to temperature changes. They will not expand or contract with temperature changes. The only difference is, the aluminum panels tends to conduct heat more than the fiberglass material. As a result, it heats up from the sun.
Strength and weight capacity
In terms of strength and weight capacity, the aluminum panels are stronger than the fiberglass material. They are also more impact resistant and can take a thrashing without breaking.
Under panel material
Another distinguishing feature is the under panel material.
The UnderCover Ultra Flex has a carpet-like textured under panel material. This keeps your valuables safe against damages like scratches and dings.
It also gives an upscale look and feel, taking your vehicle to the next level.
However, it gives a consistent and seamless look. This creates an OE-like look that will not compromise your looks when driving with the cover open.
Both covers mount flush with the truck bed to give a sleek and aerodynamic appearance.
But, from the name, Ultra Flex has an extremely ultra-low profile that lies more flush and seamless with the bed rails.
The UnderCover Flex on the other hand has a regular low profile design, but it still provides an aerodynamic appearance.
Low profiles are important because they create sleeker appearances and they hardly compromise your factory look.
They also help improve gas mileage, since they reduce wind drag.
Both covers can qualify for low profiles, but if you want an extremely low profile then Ultra Flex should be your number one choice.
They have rubber seals all around them to block out water and all the other weather and road elements. The tailgate also has a seal for better protection.
They also have bed rail mounting systems. This system channels water into the drainage tubes which then carry the water out of the vehicle.
With this, your truck bed cover will remain dry, but in case of heavy rainfall, only a few drops of rain will get into the truck bed.
Both the UnderCover Ultra Flex and Flex Tonneau Covers lock with the tailgate. They do not have separate locks, instead, they have deadbolt locking rails. When latched, the rails will interlock with each other.
Paired with a lockable tailgate, this will offer maximum security. No one will be able to access your truck bed unless they have your tailgate keys.
This locking mechanism is great since it saves you the stress of a rusted lock. You will also not have to carry around different keys for your tailgate and the cover.
When it comes to closing and opening the tailgate, the UnderCover Ultra Flex Tonneau Cover has an edge.
This is because it has a dual-action tailgate seal. With this design, you can open and close the tailgate when the tonneau cover is closed or open.
This ensures convenience as well as ease of operation.
UnderCover Flex Tonneau Cover, on the other hand, lacks the dual-action tailgate feature.
Because of this, you can only close the tailgate when the last panel of the tonneau cover is open.
Compatibility with other accessories
Both of these tonneau covers install inside the truck bed rails. This gives space as well as leaves the stake hole pockets open. With this, you are able to install a utility rack as well as other accessories.
A truck bed cover can operate on its own without any additional accessories.
But these additional accessories can enhance the cover’s ease of operation as well as your experience using it.
This will illuminate your entire truck bed, allowing you to access your cargo more easily even when it’s dark.
Installation and removal
Installing both of these truck bed covers is rather easy and will take around 20 minutes. Neither of them requires drilling, except when installing the drainage system.
They also allow for one-person installation since they are not very heavy, especially the UnderCover Flex truck bed cover.
Each of the covers has a clamp-on system and this only requires tightening, then boom! you’ll have it installed on your vehicle and ready to use.
Both covers can fold to different positions to give you access to your cargo.
But in case you need 100% access, the covers have a quick release system.
This will allow you to remove the bed cover within a few minutes without any tools necessary.
Made in the USA
Both truck bed covers are made in the USA and backed by a manufacturer’s warranty.
Which one is for you?
For maximum protection against wannabe thieves and road and weather elements, a hard folding tonneau cover is the way to go.
The Ultra Flex, having a full aluminum construction offers more strength and durability, hence the higher price. The UnderCover Flex also stands out with its top resistance to scratches and dents as well as its lightweight.
They have almost similar construction and will keep your cargo just as secure. All BAK covers are made in the USA.