We just put down brand new travertine after our pool remodel. I wanted to get it seal as soon as possible. We went with National for coating and the non-slip beads mainly because they were the only ones to guarantee a minimum of 3 years on their coating. Everyone else said 1 year to 18 months. Didn’t feeling like doing this every year. The sales team was very knowledgeable and the gentleman who put the sealant down was professional and nice. Definitely recommend National.