
Expanding Spray-On Waterproof Roof Coating
- Fast Application
- Self-Healing
- Impact Resistant
- Up to 50-Year Warranty


Traditional roofing sealants take days of difficult work to apply and leave too much room for error. Expandothane™ offers a better way. Proven to withstand UV damage, hail, and extreme weather, the Expandothane Roofing System uses a high-pressure spray-on application for fast, easy and long-term waterproofing.

Hail Resistant

UV Protection

Water-Proof
Fast Application
Complete your job in a single application using a
high-pressure spray that dries in seconds.


Hail-Proof
Proven to withstand hail and extreme weather with no signs of breaking, cracking or leaks.
Up to 50-years
of warranty
Expandothane has zero water content and a failure-free track record since it was introduced in 2004.

Save Time, Hassle and Money With the Ultimate
Waterproof Barrier
This amazing formula contains micro blowing agents that create a tough yet flexible waterproof barrier to completely eliminate leaks. Unlike standard polyurea, this VOC-free plural component hybrid expands up to seven times its volume to span gaps and fill any holes.