Truck Cap Rear Window Seal
How to Choose the Right Rubber Boot Seal
You can acquire rubber boot material for your special project. This seal is manufactured from long-lasting EPDM synthetic rubber compound and incorporates a flexible spring steel clip for fastening to any flange. This material is sold by the foot. To find how much you need measure the distance encircling your cab opening. You get three options of rubber to apply for waterproofing your cabs together.
Tips for Getting the Right Fit
To find how much you want measure the space around your cab opening. It is imperative that both openings are perfectly the equal size. Make sure to measure the opening before ordering. Every installation is unique.
Universal Fit: Compatible Rubber Seals for Trucks and Rigs
This rubber boot seal is often used in vehicle sealing applications. It's suitable for most compact trucks. Whether you're retrofitting a camper shell or building a personalized rig, this seal offers broad fitment and dependable performance for your cab connection project.
Truck Cap Rear Window Seal Features and Benefits
| Feature | Benefit | Use Case |
|---|---|---|
| Weather-Tested Seal | Handles rainstorms without leaks or performance loss | Reliable weather barrier for daily-use trucks or RVs |
| Prevents Heat and Sound Transfer | Improves cab comfort by blocking wind and road noise | Useful for sleepers and audio builds |
| U-Channel Orientation Consistency | Both U-shaped edges face the same way for easier installation | Helps avoid confusion during install, especially for beginners |
Order Form
To begin your order just enter the total amount of feet of boot material you need in the appropriate box next to the item you want to order below. Check your entries then click on the "Order Now " button.
Accordion Boot - Part Number 541

The accordion boot is designed for cabs where you take out the truck window. This product works best with fiberglass shells that are 1/8" to 3/16" thick. Please note that both openings must be exactly the same size for this boot to fit properly.

$8.95 per foot
In Stock
Order 541
- Enter the total amount of feet of boot material you need in the text box
- Check your entries, then click on the "Order Now" button.
Compression Boot - Part Number 540

Use this seal when you leave the rear slider window in the truck. This product works best with fiberglass shells that are 1/8" to 3/16" thick. You will also use this boot if the opening in the fiberglass shell is much larger than the opening in your truck.

$7.95 per foot
In Stock
Order 540
- Enter the total amount of feet of boot material you need in the text box
- Check your entries, then click on the "Order Now" button.
Extra Wide Accordion Boot - Part Number 543

The extra wide accordion boot is designed applications where you have a large gap between the space you want to seal. This product works best with fiberglass shells or sheet metal flange that are 1/8" to 3/16" thick. Both openings must be exactly the same size for this boot to fit properly.
$11.50 per foot
In Stock
Order 543
- Enter the total amount of feet of boot material you need in the text box
- Check your entries, then click on the "Order Now" button.
Accordion Boot - Ultra Wide 10" Part Number 544

The Ultra Wide 10 Inch accordion boot is designed for very wide gaps between cabs.. This product works best with fiberglass shells that are 1/8" to 3/16" thick. Please note that both openings must be exactly the same size for this boot to fit properly.
$13.90 per foot
In Stock
Order 544
- Enter the total amount of feet of boot material you need in the text box
- Check your entries, then click on the "Order Now" button.
Accordion Boot 15 - Part Number 546

The Accordion Boot 15 is designed applications where you have a large gap between the space you want to seal. This product works best with fiberglass shells or sheet metal flange that are 1/8" to 3/16" thick. Both openings must be exactly the same size for this boot to fit properly.
$16.50 per foot
In Stock
Order 546
- Enter the total amount of feet of boot material you need in the text box
- Check your entries, then click on the "Order Now" button.
Compression Bulb Seal - Part Number 545

Use this seal when you leave the rear slider window in the truck. This product works best with fiberglass shells that are 1/8" to 3/16" thick. You will also use this boot if the opening in the fiberglass shell is much larger than the opening in your truck.
$8.25 per foot
In Stock
Order 545
- Enter the total amount of feet of boot material you need in the text box
- Check your entries, then click on the "Order Now" button.
Frequently Asked Questions
- Can I install the boot myself?
Yes, most customers install the boot themselves with basic tools. A helper and soapy water can make the process easier.
- Does the boot stretch or compress?
Yes, the accordion-style folds allow for both stretching and compression, ideal for movement and flex between vehicle sections.
- What if I’m not satisfied with my truck cap rear window seal?srsltid=afmbooo keydr59daj3qtce0ninr0o0ln1tyo4o28jknksqhqknxwyr0?
We offer a 30-day money-back guarantee. If you're not satisfied, simply contact customer service and return the product.
