I have had some good results with kreem it has contributed to the success of many a resto project but since the intro and not so welcome high percentage of gas stations selling "ethanolled" fuels sorry but from my experience good old kreem ends up looking like dissolved styrofoam trying to cling to the inside of your tank. But not so with por 15. This product sticks better than dried oatmeal. From a professional standpoint and not trying to sell a product. I simply have to say that theese folks have fuel tank lining products down pat. This is truly a fantastic product that will outlast your fuel tank. Thanks folks.