I had my deck treated by Sealmaxx of Colorado about 5 yrs. ago. The 1st year I called and complained that it looked terrible. I was told it needed to be washed off and that they would come out and do it for me. They did and it looked a little better. Every year since it's been going down hill. I wash it off yearly but it's not starting to splinter and crack. This year I had to give in and have someone come out and sand/stain and seal. My grandkids could not even go out there without getting splinters. This treatment cost me alot of money and I was told it would last for 25 years. All my friends would come over and say that I needed to seal my deck and I would tell them, "OH no it's OK, it's going to last for 25 years" - not so. I had to finely wise up and give in to spending more money on it.