Truck Cap Rear Window Seal
How to Choose the Right Rubber Boot Seal
You can purchase rubber boot material for your special project. This seal is extruded from heavy-duty EPDM synthetic rubber substance and contains a bendable spring steel clip for fastening to any rim. This material is sold by the foot. To find how much you require measure the length encircling your cab opening. You get several options of rubber to employ for waterproofing your cabs together.
Tips for Getting the Right Fit
To ascertain how much you need measure the space around your cab opening. It is important that both openings are accurately the matching size. Make sure to measure the opening before ordering. Every installation is different.
Don't Settle for Less: Upgrade to a Seal Built for the Road
Choosing the right seal is critical for your vehicle project. This rubber boot delivers due to its high-quality construction and real-world reliability. We take pride on providing products that meet your needs for long-term satisfaction. Don't settle for flimsy seals, upgrade to one that's built to last.
Truck Cap Rear Window Seal Features and Benefits
| Feature | Benefit | Use Case |
|---|---|---|
| Made in the USA | High manufacturing standards and local support | Ideal for buyers who value American-made products |
| Silicone-Friendly Seam Sealing | Easy to seal end joints with a small bead of silicone | Ensures total waterproofing where ends come together |
| Watertight Design | Keeps moisture and dust out, even in rough outdoor environments | Protects interior from water, wind and dust |
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 cut the truck cap rear window seal?srsltid=afmbooobaqz6bpewr2bfbfozxcm8elixnvhigxpwu41 9h5ickvugt to fit around a third brake light?
No, cutting is not recommended. Instead, remove the brake light and cover the hole, or change how the boot is mounted if you need to preserve the light.
- How long does it take to receive my truck cap rear window seal?srsltid=afmbooobaqz6bpewr2bfbfozxcm8elixnvhigxpwu41 9h5ickvugt order?
Delivery typically takes 3 to 10 days depending on your location and order volume.
- Is it suitable for sealing between an airbag mounted truck cab and the body hard mounted to chassis rails on a truck?
As long as there is some sort of flange or wall to install the boot it should work. The thickness of the flange should not exceed 3/16" (4.7625mm) The accordion design allows for independent movement or flex between the cab bodies.
