I was having a very difficult time finding an effective and more lasting anti-slip solution for the polished travertine coping on my pool. There were short term fixes and a lot of misinformation from other sources that had no realistic idea how to handle this type of travertine (it’s very, very slick). I contacted this company and though it was a smaller job they accommodated, and I couldn’t be happier with the result. Thanks to Mark and Kenny for their help and expertise.