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 extruded from heavy-duty EPDM synthetic rubber substance and incorporates a flexible spring steel clip for affixing to any flange. This material is available by the foot. To specify how much you require measure the length encircling your cab opening. You have several alternatives of rubber to apply for waterproofing your cabs together.
Quick and Easy Installation
Installing this rubber boot is user-friendly and requires minimal tools. Just fit the seal firmly onto the rim of the window or pass through opening. This forms a watertight connection between the two units. Regardless of whether you're adventuring, this seal blocks debris and preserves interior comfort during your journey.
Don't Settle for Less: Upgrade to a Seal Built for the Road
Choosing the right seal is important for your vehicle project. This rubber boot stands out due to its top-grade construction and real-world reliability. We take pride on providing products that surpass your expectations for long-term value. Don't settle for cheap seals, upgrade to one that's made for the road.
Truck Cab Cap Window Seal Features and Benefits
| Feature | Benefit | Use Case |
|---|---|---|
| Prevents Heat and Sound Transfer | Improves cab comfort by blocking wind and road noise | Useful for sleepers and audio builds |
| Multi-Vehicle Fit | Works on trucks, vans, semi cabs, and custom enclosures | Versatile for commercial and recreational conversions |
| 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.
$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 truck cab cap window seal by myself?
Most users successfully install the truck cab cap window seal with basic tools, soap solution, and occasionally a helper for positioning.
- Can I order a custom lengths?
Yes, because we sell the material by the foot we can provide the exact lenght you need for your project. You can also contact us if you need help finding the right length.
- Does the truck cab cap window seal allow for movement between the truck and camper?
Yes, the accordion-style folds are designed to flex, allowing for some movement and vibration without breaking the seal.
