Truck Cap Sliding Windows
How to Choose the Right Rubber Boot Seal
You can get rubber boot material for your special project. This seal is manufactured from tough EPDM synthetic rubber substance and integrates a flexible spring steel clip for attaching to any flange. This material is sold by the foot. To ascertain how much you require measure the distance encircling your cab opening. You get several choices of rubber to use for waterproofing your cabs together.
Tips for Getting the Right Fit
To specify how much you need measure the distance around your cab opening. It is important that both openings are exactly the equal size. Make sure to measure the opening before ordering. Every installation is different.
Why EPDM Rubber Is the Best Choice for Long-Lasting Seals
The EPDM rubber seal is designed to withstand challenging conditions such as sunlight. It's perfect for both long-term installations. Compared to generic seals, this material offers more protection. It's a solid choice for anyone looking to preserve their truck cab connection with a dependable sealing solution.
Truck Cap Sliding Windows Features and Benefits
| Feature | Benefit | Use Case |
|---|---|---|
| Audio Blow-Through Compatible | Perfect for stereo mods and custom subwoofer enclosures | Used in high-performance truck audio builds |
| Supports Walk-Through Conversions | Lets you convert separate spaces into one continuous interior | Used in van builds, campers, and custom sleeper cabs |
| Multi-Vehicle Fit | Works on trucks, vans, semi cabs, and custom enclosures | Versatile for commercial and recreational conversions |
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.
$7.95 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 truck cap sliding windows by myself?
Most users successfully install the truck cap sliding windows with basic tools, soap solution, and occasionally a helper for positioning.
- What is an accordion boot?
An accordion boot is a flexible rubber connector that creates a weatherproof seal between two compartments, such as a truck cab and camper shell.
- Can I keep my sliding windows and still use a = truck,cap,sliding,windows ?>?
Unfortunately, no. The slider windows must be removed because the truck cap sliding windows equires a clean flange or wall to attach. Sliders block access to this area.
