I purchased and applied RV Roof Magic about a month ago. It looks great and I am hoping it will last for some years to come. I have not had any leaks so far. One side benefit has been that the reflectiveness of the product has apparently helped in keeping my motorhome cool. For twenty years we have gone to Cape Cod in the summer and have always battled keeping the unit cool. This year I have been able to run only one air conditioner on low and keep the unit at 69- 70 degrees, parked in full sun. For a motorhome with single pane windows and is 21 years old, this is amazing. Thank you. At 37 feet, I did not use all the 5 gallons, but when I get back, I will go over some of the apparent problem areas with another coat. Thanks for the great product.