Watch the Transportation Overview (4:02)
BEFOREAFTERSkylight & Solar — slide to compare
BEFOREAFTERAntenna & Penetrations — slide to compare
The Crazy Seal Roofing System
Transportation Roofing
Seal a unit in a day. Keep it on the road for good.
Crazy Seal is a seamless, fiber-infused silicone membrane for tractor trailers, box trucks, and delivery vehicles — built for the constant flexing that vibrates ordinary sealant apart. One crew can seal a unit in a day, in your own yard.
One kit typically covers a box truck or trailer roof. A fire department sealed a 24' rescue trailer for about $1,000 in product instead of spending $40,000 on a replacement. Sealing a fleet? Talk to us about volume.
Sized & priced to your exact roof
Kits scale from a single tube of caulk to a complete system for thousands of square feet. A 24' trailer runs about $1,200 in product — versus writing off the unit over a roof.
In-stock & ready to ship from our USA facility
Split into 4 installments on $100–$1,000 orders
Free shipping on orders over $500
50 year warranty when registered
Questions about sizing or fit? Call (800) 963-0131 — we'll make sure you get exactly what your roof needs.
The Details That Matter
Why the System Works
40 mils of cured membrane. The first layer cures to 20 mils; the second doubles it to 40 — even thicker where Crazy Caulk and Crazy Patch seal seams and penetrations.
100 sq ft per gallon. Kits are calculated by square footage, so the kit sized to your roof has exactly what it needs.
Built for imperfect installers. We recommend the double layer in most instances — the second coat guarantees proper coverage everywhere.
You never install alone. Step-by-step video suite, installation PDFs, and in-house project specialists standing by.
50-year no-hassle warranty. Finish the install, fill out a simple form, and your roof is covered.
21½ Reasons Why — Full Overview (10:24)
Ships Direct To Your Door
Pick a Pre-Built Kit
Vehicle roofs use the same flat-roof kits, sized by square footage. One kit typically covers a box truck or trailer roof — and one crew can seal a unit in a day.
Seamless Roofing Kit (Double Layer)
Our flagship double-layer system with Crazy Cloth reinforcement.
or 4 payments with Affirm
Direct-to-Deck Kit
Seal directly over plywood or OSB decking — no underlayment needed.
or 4 payments with Affirm
Crazy Good Repair Kit
Patch leaks, seal penetrations, or add a fixture to any Crazy Seal roof.
or 4 payments with Affirm
Real Roofs. Real Results.
Real Vehicle Roofs, Documented Start to Finish
These aren't stock photos — they're documented customer installations, in their own words and pictures.
Straight From the Roof
Real reviews from customers who installed it themselves.
“THANK YOU for a great and reassuring experience! I have already referred this system to 3 family and friends. I'm looking forward to a very long, assured feeling of protection from water intrusion.”
David Vincent from Key Largo, FL
“We could not be more pleased with the Crazy Seal product. We are expecting to have many years of enjoyment from our sunroom now that we do not have to worry about leaks.”
Philip Posey from Tuscumbia, AL
“After viewing the DIY videos 4 times, I followed the instructions to the letter. The product went on easily.”
Douglas Evans from Overton, NV
“Great product, went on like advertised and ended up with a great looking roof that will last a long time.”
Dennis Van Dusseldorp
Do Your Homework
Why Crazy Seal?
This isn't box-store roof coating. Watch what makes the system different — and why it costs more.
Why is Crazy Seal More Expensive?
Let's Get Crazy — Watch Our Crazy Tests (5:24)
How It Goes Down
No torches, no tear-off, no special tools. Three steps, guided by step-by-step videos.
1. Clean
Wash the roof with Crazy Clean so the membrane bonds to the roof — not the dirt.
2. Seal
Caulk and patch every seam, screw, and penetration with Crazy Caulk and Crazy Patch.
3. Coat
Roll on the seamless Crazy Seal membrane and never worry about that roof again.
Get Specific
Guides for Specific Transportation Applications
Every roof has its own failure points. Pick your exact application for a guide written for it.
Free Kit Consultation
Talk to a Specialist About Your Vehicles
One unit or a whole fleet — tell us what you're running and we'll size the right kits with you.
- Backed by our 50 year warranty — do it once, do it right
- Kits ship straight to your door. Free shipping over $500
- Prefer to talk it through? Call us M-F 9AM-6PM EST