Do Leer Caps Leak?

What’s the purpose of installing a truck cap? It’s to prevent damages — some of which are the various elements. The challenging part of using a cap is when it starts leaking profusely. So, this brings about the question — Do Leer Caps Leak? — that people who want to give Leer Caps a try are likely to try.

Do Leer Caps Leak?

When it comes to “if Leer Caps leak,” they are tightly sealed to prevent leakage, to a large extent. It’s also a fact that no truck cap is 100% waterproof.

Leer Truck Caps

Do Leer Caps Leak
Leer Truck Caps

Leer Caps are among the list of the best truck caps you can find in the market, that’s if they’re not the best. Leer truck caps are designed to help you provide a covering above the bed of your pickup truck — especially if you have the intention of going for outdoor camping.

There are a couple of reasons why you need to purchase Leer Caps — something new for a change. They entail:

Key Benefits Of Using Leer Truck Caps

Widely Available

The company, Leer, has a good number of facilities, manufacturing facilities, throughout the states. What this means is that you’ll enjoy fast shipping, given that the brand is regionally focused.

Modern Designs

When you’re in need of a couple of timeless designs, the brand to buy from is Leer. The company has manufactured numerous models from which you can choose. Because of the company’s expertise, the company creates reliable, sleek covers and doesn’t make use of vinyl trim to cover those unfinished ends like other brands that produce softcovers.

Enjoy Skirted Models

Using the truck caps by the company, Leer, you get many options to choose from. Frequently, they produce new designs and release them into the market. Their skirted model creates a provision for good fitting designs that’ll be able to cover all the plastic rail caps adequately.

Wide Variety Of Leer Truck Caps

This brand doesn’t in any way limit you. Below are the amazing styles you can choose from:

  • Ceiling mounted lockable storage bin
  • Three outlets 12V power block
  • Keyless remote caps
  • Adventure Sports Bowing & fisherman package
  • Ceiling mounted nylon cargo net
  • Removable front window and front sliding windows caps

How To WaterProof Truck Cap

If you have plans on keeping your truck cap dry and away from bad weather, what’s recommended is “waterproofing your truck cap.” There are people who love having their truck at a constant temperature and dust-free; waterproofing your truck comes in handy if you desire to achieve what was stated in the preceding sentence. Making your own RV would get you delighted until you discover that you might just wake up with areas of leaks or excessive dust in the morning.

As a result, we have taken out time to put together two easy methods — methods with which you can use to waterproof your truck cap and make it ready for camping.

Let’s proceed.

Waterproofing Your Truck Cap

Below are the two well-known methods of carrying out the process of waterproofing your truck cap and the various things needed to accomplish this.

Method One

In the first step, the major thing you’d do is to drill the truck cap on the truck. It’s time to get a screwdriver and a drilling machine, too. To add, look out for a blanket — a large blanket — because you’ll have to put your truck cap right on it. Doing this will help you avoid any form of damage you are likely to experience in the future. It’s compulsory for you to employ a second party to manipulate the truck cap.

For you to carry out this method, you have to have the following materials and tools:


  • Screwdriver
  • Drilling Machine


  • Washers for bolts
  • 3/8” locking nuts
  • Aluminium hardware clamps
  • Blanket on which you have to place the truck cap
  • Truck bed insulation tape
  • 1.5” bolts with 3/8” threading

Now you’ve known the tools and materials, it’s time for us to go over the procedure to follow.

Ensure you spread out the sides of the blanket on which you should place the truck cap upside-down. For this part, you might want to request the help of someone. Take the insulation tape, the truck bed insulation tape, and cover the truck cap’s bottom. While carrying out these steps, ensure you do what’s possible to avoid the rear hitch. If you don’t do this, you’ll definitely not be able to easily manipulate the tailgate.

Tip: Apply a couple more layers of the truck bed insulation tape around the bulkhead, so you can be rest assured that it’s appropriately sealed.

Furthermore, open the truck’s tailgate, look for someone around and ask them to help you flip the cap side up and carefully, place it on the bed of the truck. You have to cross-check the cap and be sure that it’s evenly placed on the truck bed’s both sides. If, on the passenger side or the driver side, you have a toolbox or the other accessories, you may want to clamp only the other side. A few truck caps out there come with already-made holes. If you don’t find those holes, locate the sides of the cap and drill holes. For these holes, consider making them 24-30 inches apart.

In addition, there are truck caps you’d find that have just three holes, so in some cases, you’ll need a fourth one. This depends solely on the length of the truck bed. We’ve gotten to the point where you have to match the washer using each bolt. After this, place the bolt right inside the hole. Look at the right rear taillight assembly, and check if you’d see a hole. If you can see none, drill a small one specifically for the cap taillight.

At this point, you’d have to locate the wiring, and for you to do that, take the taillight assemble away from the cap. Find the wire and make incision. Next, strip the case and connect the high mount brake light. Locate the brake wiring from which it’s recommended you take back a piece of insulation. After that’s done, attach the high mount stop light wire to the brake wire of the truck.

Method Two

If you don’t want to make use of a drilling machine, or you don’t know how to use it, this “method two” stands as an easy method you can take as an alternative. In this method, there’s no need for any single tool. All you need is someone who will help you manipulate the truck cap. Before proceeding, make sure you have the necessary materials.


  • None


  • Prime and paint (optional)
  • RTV silicon
  • Rubber weather stripping and glue
  • Industrial cleaning and degreasing solution (i.e., break cleaner)

Ensure you clean the surface where the truck cap will come in contact with the truck bed. You can make use of any industrial cleaning and degreasing solution, such as a brake cleaner. Make sure that every form of debris, grease, and dirt are gotten rid of from the bed rail and also from the truck cap surface — which will meet the rails. Check for any kind of old weather stripping/glue — when found, take it out from both surfaces.

Tip: You can prime and paint the surface of the truck cap and the bed rails in order to achieve a better seal that’d last for a long time.

On the truck cap, place rubber weather stripping. If you want weather stripping, you can get them at most auto shops — and it’s quite affordable. In addition, it’s necessary you, at the auto shop, request for weather-stripping glue, because you would need to apply it on the truck cap.

Make sure you apply a reasonable amount of glue on the truck cap and, without rush, carefully stick right on the rubber stripping. It’s a matter of seconds for the glue to dry — and another interesting thing about it is, it’s extremely sticky. Knowing very well that you won’t get another chance to adjust it, ensure that the stripping is evenly applied. There are truck caps out there that might have doors/windows and several other openings. If that’s what it is for you, go ahead and carry out the process of sealing these ones, too.

What’s more, you have to, again, check whether it’s sealed thoroughly. Go in search of a garden hose, use it, and pour water on the truck cap. While doing this, keep your eyes focused inside to be sure you did it correctly. If you’ve started encountering leaks, apply RTV silicone. You can find this material in the auto parts shops. Make sure the surface area is entirely dry before applying a solid, thin bead around the leaking zone. After you’ve allowed it to cure, retest it and check whether it worked or not. Checking it would also help you discover other leak points.

Frequently Asked Questions (FAQs)

Are Leer Truck Caps Waterproof?

Based on the response from the Leer Caps dealers, they strive in the best of their ability in order to make the caps waterproof. However, you also should know that no truck cap is 100% waterproof.

How Much Do Leer Toppers Weigh?

The figure is a sketchy one: it’s in the range of 150 – 170 lbs.

How Much Does A Leer Cap Cost?

$1,200 – $1,800. This is an estimate, depending on features.

Do Leer Caps Leak? – Conclusion

In addition to giving an answer to the question — Do Leer Caps Leak? — we went further to touch two methods you can adopt in making your truck cap waterproof. It’s very important that you know how to waterproof the truck cap. If you have intentions of using your truck for recreation and camping, it’s necessary you get your truck cap weatherproof and waterproof.

Thanks for reading.

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