Truck Cab Cap Window Seal
How to Choose the Right Rubber Boot Seal
You can obtain rubber boot material for your special project. This seal is manufactured from resilient EPDM synthetic rubber compound and uses a bendable spring steel clip for affixing to any rim. This material is sold by the foot. To specify how much you need measure the length encircling your cab opening. You get several choices of rubber to make use of for sealing your cabs together.
Quick and Easy Installation
Installing this rubber boot is easy and can be done with few tools. Just attach the seal tightly onto the thin wall of the window or pass through opening. This forms a secure connection between the two units. Whether you're adventuring, this seal keeps out moisture and maintains cabin integrity during your journey.
Why EPDM Rubber Is the Best Choice for Long-Lasting Seals
The EPDM rubber seal is built to resist challenging conditions such as cold. It's tailored for both weekend getaways. Compared to cheaper seals, this material offers more protection. It's a reliable option for anyone looking to preserve their truck cab connection with a dependable sealing solution.
Truck Cab Cap Window Seal Features and Benefits
| Feature | Benefit | Use Case |
|---|---|---|
| UV & Weather Resistant | Withstands sun, rain, and temperature changes without cracking | Long-term durability for vehicles stored outdoors |
| Weather-Tested Seal | Handles rainstorms without leaks or performance loss | Reliable weather barrier for daily-use trucks or RVs |
| Affordable, High-Value Solution | Great quality at a competitive price point | Cost-effective choice for budget-conscious builders |
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 keep my sliding windows and still use a truck cab cap window seal?
Unfortunately, no. The slider windows must be removed because the truck cab cap window seal requires a clean flange or wall to attach. Sliders block access to this area.
- How long will my truck cab cap window seal last?
EPDM rubber is extremely durable, UV-resistant, and built to last for years. Proper installation can extend its lifespan significantly.
- 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.
