Stewart sent in a bunch of pics on his RV project using the RV roof Magic. Stewart chose to first remove his vent and ac covers and re-caulk using our Butyl MS caulk, which was field tested to be compatible with RV Roof Magic. He then did all his cut in work around the perimeter of the RV as well. The next day he completed the project by covering the main areas of the roof. A total of 5 gallons was used for his 230 ft roof. As we state on our site, we suggest chalking off your roof into quadrants 6X8, When you are done filling in one of those sections, you should be done with a gallon of the material. That way you are applying it at the proper mil rate. Always be sure the surface is perfectly dry before application.