Truck Cap Donut
How to Choose the Right Rubber Boot Seal
You can obtain rubber boot material for your special project. This seal is extruded from tough EPDM synthetic rubber substance and has a bendable spring steel clip for fastening to any rim. This material is available by the foot. To determine how much you need measure the distance encircling your cab opening. You have 3 alternatives of rubber to make use of for waterproofing your cabs together.
Quick and Easy Installation
Installing this rubber boot is simple and requires minimal tools. Just clip the seal tightly onto the lip of the window or pass through opening. This ensures a watertight connection between the two units. Even if you're camping, this seal keeps out debris 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 withstand severe conditions such as cold. It's perfect for both daily use. Compared to standard seals, this material performs better. It's a solid choice for anyone looking to protect their truck cab connection with a dependable sealing solution.
Truck Cap Donut Features and Benefits
| Feature | Benefit | Use Case |
|---|---|---|
| Silicone-Friendly Seam Sealing | Easy to seal end joints with a small bead of silicone | Ensures total waterproofing where ends come together |
| Fast, Reliable Shipping | Quick turnaround when time-sensitive installs are needed | Helpful for last-minute road trip or show prep |
| UV & Weather Resistant | Withstands sun, rain, and temperature changes without cracking | Long-term durability for vehicles stored outdoors |
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
- Does the truck cap donut require glue to install?
No glue is required. The truck cap donut has a spring clip embedded in the EPDM rubber that clamps onto a thin flange. You can optionally glue the seam using cyanoacrylate (SuperGlue), but avoid petroleum-based adhesives.
- What is the minimum corner radius I can use?
The recommended minimum radius for corners is 1 inch. Tighter corners may cause the truck cap donut to bunch or kink.
- Will a truck cap donut reduce road noise?
Yes, the air-tight seal created by the truck cap donut helps block wind noise and some road vibrations between the cab and camper.