It's proven. Roof coatings can save you money on roof replacement and cooling costs.
A seamless, watertight Lexis silicone coating system on the modified bitumen roof of March Air Reserve Base in California fixed all roof leaks.
Don't hesitate to call on out of state contractors if you are unable to find one in California. You may not be able get a great deal on a small roof but they may have more experience than anyone local. Just make sure they are licensed and insured.