Make waterline tile a part of your pool and spa! Waterline tile is both beautiful and beneficial to the cleanliness and long-term maintenance of your pool. Tile accentuates your fiberglass pool and or spa and gives your pool character. Choose from a wide selection of styles and colors. Tile and silicone grout are extremely easy to clean, simplifying the Ã¢â‚¬Å“waterlineÃ¢â‚¬Â maintenance.