In-Depth Review: U-Pol Raptor Black Urethane Spray-On Truck Bed Liner Kit

In-Depth Review: U-Pol Raptor Black Urethane Spray-On Truck Bed Liner KitYour truck is built to work hard and haul a variety of materials. But even the toughest trucks will benefit from a high-quality bed liner.

Urethane spray-on truck bed liners are an easy and effective way to guard your truck against scratches, scrapes, rust, corrosion and other potential damage. Simply spray the product directly onto the truck bed for an instant layer of protection.

U-Pol is a popular manufacturer of bed truck liners. We took an in-depth look at the Raptor Black Urethane Spray-On Truck Bed Liner Kit. Does this kit provide reliable protection? Is it easy to apply, even for an amateur? Our complete review starts right now:

About the U-Pol Raptor Spray-On Truck Bed Liner

Don’t worry if you’ve never used any type of urethane bed liner spray before. This kit contains almost everything you need including four 750 ml bottles of urethane liner, a can of Hardener, a Process Guide and even a spray gun. Note that you will need an air compressor to operate the spray gun.


  • Scratch, Stain and Corrosion Resistant
  • Reduces Sounds and Vibrations
  • Includes Four 750 ml Bottles of Spray
  • Includes Sprayer Gun
  • Rapid Dry Allows Second Coat Application within One Hour of First
  • Creates Watertight Seal
  • Seals Truck Beds, Metal Bumpers, Plywood Floors, Vehicle Roofs and More
  • Available in Black, Red, Blue, Green and even Purple

How Do You Apply Raptor Urethane Spray?

Although urethane is stronger and more durable than paint, you’ll need to prepare your truck in basically the same way you would if you were going to paint it. This means taping and covering the sides of the bed so only the liner is exposed. The more care you take during preparation, the better the finished product will look.

Once the liner is taped off, you’re ready to start. The first step is to turn on your air compressor to between 40 and 60 PSI. If you don’t have an air compressor, you’ll need to buy one, borrow one from a friend or rent one from a store like Home Depot.

Open up one of the Raptor bottles. You’ll add Hardener to the internal fill line. Close the bottle and shake thoroughly. Then attach the Raptor bottle to the Spray Gun. Now you’re ready spray the truck liner (or other surface).

Apply with a controlled sweeping motion. You’ll be able to see the texture patterns form and can adjust your spray direction accordingly. After applying the spray, you have a short period of time where you can then use a brush or roller to change the texture.

Make sure the surface is free from dirt and rust, otherwise the spray won’t stick evenly. Most people prefer to lightly sand the area before applying the spray. Any bare metal should be treated with U-Pol #8 Acid Primer.

Once the spray has been applied, it’ll dry quickly. You can apply a second coat in about an hour. Usually two coats will provide plenty of protection.

For best performance, clean the sprayer with acetone every time you switch bottles. Dip the sprayer’s intake straw into a small jar of acetone and then squeeze the trigger. You’ll want to spray into a box or other safe area. Just a few seconds of spraying should clean the nozzle just fine. Wipe away any excess with a rag and you’re ready to use another bottle of Raptor.

Be sure to take all proper safety precautions. Wear a vapor respirator at all times. You’ll also want to protect your hands with at least two pairs of nitrate gloves. Of course, you’ll want to wear clothes you don’t mind getting splattered with overspray.

Here’s What Others Are Saying

Buyers are generally very happy with both the quality and the ease of use. Many people who had never sprayed their own liner before said the process was easy and intuitive.

The big secret to success is preparation. You might consider a “dry run” where you use the spray gun and air hose to mimic the spraying actions. This lets you identify any tangles and potential kinks in the hose which might impair the spraying.

Next, you’ll want to start spraying in the corners, seams and over the tire wells. You’ll often overspray in these small areas if you target them after you’ve already sprayed the larger sections of the liner. By hitting the corners first, you can provide coverage without creating messy buildup.

Also, many buyers recommend starting with horizontal surfaces before vertical ones. As the product is used, the bottle becomes lighter and different to handle. When the bottle is almost empty, you’ll typically get a more consistent spray pattern vertically than horizontally.

Many people recommend setting the compressor regulator at 70 PSI. Then add an in-line regulator set to 55 PSI. This should give you a consistent pressure of 55 PSI regardless of how you swing the sprayer.

Generally, U Pol spray is considered tough and durable with great traction. Users commonly say that the difference between a great-looking truck bed and an okay-looking one will have more to do with application than the product. If you spray properly, the end result can look and function as well as any professionally applied liner.

Pros and Cons


  • Dual-component urethan system provides all-weather protection
  • Reduces sounds and vibrations when driving
  • Four containers of spray cover 125 square feet
  • Included applicator gun is easy to use


  • Requires air compressor
  • Potentially toxic (wear gloves and a mask)
  • Quality of application is heavily dependent on user’s skill

Final Verdict

The U Pol Raptor Urethan Spray On Truck Bed Liner is a top-of-the-line choice. The kit includes an easy-to-use sprayer as well as plenty of Raptor spray. Can easily cover even a large truck bed.

This liner spray can help significantly extend the life of your truck by helping to protect against scratches, rust, corrosion and more. Also acts as a sound dampener. Plus, adds a touch of sophisticated style. A great product at an affordable price.

We give the U Pol Raptor Urethan Spray On Truck Bed Liner 5/5 Stars.

Brett Gordon

The engine behind editing at DigMyRide and the brains behind its build. During the day, Brett is a thirty-something dude from SoCal climbing the corporate ladder, but by night, he spends his time contributing to the online world of automotive tech & trends.