Applied over a month ago and much of the roof looks great. Still areas that were the worst are still that way but appear to be somewhat less. One problem very little rain over past month. I'm thinking of buying another gallon and doing those areas again plus the 2nd floor roof although i hate going up that far. I gave it 4 stars only cause not totally sure about final results, but it does appear to be working on most, and time will tell on other darker areas which i did hit failry good 1st time.

Does what it claims. More energy, clearer thinking. It has been shown all cancer is due to anaerobic activity within the cells. This product is specifically designed to provide the highest oxygen levels to the cells. My red blood count and hemoglobin levels used to be very low, and after taking this product for only 1 month they were above average and in the normal range. Can't recommend this product enough.