My pool was installed about 8 years ago with colored and stamped concrete. (Tan) The installer never sealed it and after about three years it was looking dull so I had it sealed by a local concrete company. After the sealer dryed it looked like some areas were more glossy than others to a point that some spots almost looked untreated. I never saw the guys seal it so assumed they went light on the dull areas with the sealer. Last year I had another concrete contractor come out to seal it and it again had glossy and non glossy areas. My research mentions something about the concrete PH can affect the sealer so could that be my issue ? I thought having a concrete company seal it would identify a problem like that but obviosly not. It is a salt water pool if that matters. Last year they used Certi-Vex AC1315 to seal it.
This year I intend on sealing it myself can anyone give my some recomentions on what to use ?