Cap To Truck Window Boot
How to Choose the Right Rubber Boot Seal
You can acquire rubber boot material for your special project. This seal is extruded from robust EPDM synthetic rubber substance and integrates a bendable spring steel clip for fastening to any rim. This material is available by the foot. To specify how much you need measure the length encircling your cab opening. You have several options of rubber to employ for waterproofing your cabs together.
Quick and Easy Installation
Installing this rubber boot is simple and requires minimal tools. Just secure the seal firmly onto the rim of the window or pass through opening. This ensures a secure connection between the two units. Even if you're camping, this seal keeps out rain and helps interior comfort during your journey.
Why EPDM Rubber Is the Best Choice for Long-Lasting Seals
The EPDM rubber seal is engineered to resist harsh conditions such as UV exposure. It's ideal for both daily use. Compared to low-grade seals, this material lasts longer. It's a reliable option for anyone looking to upgrade their truck cab connection with a dependable sealing solution.
Cap To Truck Window Boot Features and Benefits
| Feature | Benefit | Use Case |
|---|---|---|
| Urethane Adhesive Compatible | Allows permanent seal when needed for high-stress areas | Used in high-vibration or heavy-use applications |
| Supports Walk-Through Conversions | Lets you convert separate spaces into one continuous interior | Used in van builds, campers, and custom sleeper cabs |
| Powder-Coated Friendly Channel | Seals well even on painted or coated surfaces | Ensures compatibility with modified or custom trucks |
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
- Will the cap to truck window boot work on a walk-through truck conversion?
Yes! This is a perfect use case. The cap to truck window boot allows you to join the truck cab and camper shell or utility box with a weather-sealed, flexible connection.
- Will a cap to truck window boot reduce road noise?
Yes, the air-tight seal created by the cap to truck window boot helps block wind noise and some road vibrations between the cab and camper.
- How much will I need?
This material is sold by the foot. Unlike other companies that force you to buy more than you need. You get the exact amount you need. No waste. To determine how much you need measure the distance around your cab opening. It is important that both openings are exactly the same size. The average full-size pickup truck rear window opening is approximately 13 - 14 feet around. The average mini-truck is approximately 10 feet around the window opening.
