FlexSeal Vs. Traditional Spray-On Bedliner

Claim: FlexSeal can be used in place of traditional Polyurea Sprayed Bedliners. 

Check: Imitating the videos for FlexSeal seen online, we made our bedliner using FlexSeal. We also checked claims that the product is flexible and can be painted.

So the line goes….” Instead of going the traditional route with a bedliner, let Flexseal take care of that for you.” I see this topic covered quite often online, and we often wonder if people know what they’re talking about when claiming this could work. We decided the only way to finally put this question to rest is by doing it ourselves.

Let’s cover this topic in today’s “Review of FlexSeal for use as a bedliner.”

I’m not going to lie, Flexseal is a wonderful product, and I think it works quite well for specific jobs. However, there are some clear discrepancies in the arguments being made for this product in its use for truck bedliners. We will tackle these problems one at a time. 

We found after using several layers, Flexseal did create a waterproof smooth protective shell around our bedliner. However, we used much more product than expected to achieve this outcome. This brings us to the first question in this test.

  1. Cost

Flexseal itself can be a bit pricey. When covering an entire truck bed, it’s safe to say that if you intend on creating an adequate fully covered protective sealed layer, you will need at least 3 gallons. Going off current pricing on amazon, that puts you at around 300 dollars. 

Running, scratching and denting where pressure is applied prior to FlexSeal fully curing :/

This is a major problem for those wanting to use this product to save money. This price does put you under the typical price range you will be looking at for a typical sprayed bedliner but not by a wide margin. The typical price range is somewhere in the ballpark range of 4-450 dollars. 

  1. Strength 

One major issue while applying the FlexSeal product was with it constantly dripping before hardening (curing). Once FlexSeal is exposed to air or moisture, it has a 15 to 30 minute cure time. This is drastically longer than any polyurea in the bedliner market. Typically polyurea will take a few seconds to harden. This is why you do not see a lot of bedliners driving around with a dripped look. This itself is enough for us to decide against using this product for bedliner use in the future.

Time for this junk to come off. We do not recommend anyone keep FlexSeal on their vehicle for the long term.

Unfortunately, the downsides do not stop there. We also found that FlexSeal, unlike polyurea, tends to tear when bent. This is due to its low tear and tensile strength. 

Polyurea has a high tear and tensile strength somewhere in 500lb/I for the former and 5000psi for the latter. Although FlexSeal does not list their tear strength, they do show a tensile strength of around 3200psi. 

We felt thankful we chose to use our old go-getter pickup truck and not one of our new models at this point in the experiment. This product did some major damage and looks quite terrible.  

For comparisons, here are some pictures from the sprayed bedliner example we used. In this case, it was spray applied by a local ArmorThane applicator here in Springfield. We were in and out within a couple of hours, and with a price tag not far off from the cost of our dreadful experiment, it’s safe to say that the sprayed bedliner was the winner. 

Now this is how a bedliner should look! Thanks ArmorThane!

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