About 20 years ago my inground pool had a 3" row of tile at the water line. I would like to replace it and I'm concerned about what I need to use to get it to stick. It will be attached to a material that looks like PVC. There is a very small ledge in the track around the pool where I'll be laying the tile. I live in Greenville, SC and we may have a few days every year where the pool freezes, but the water level would be below the tile in the winter time.