Pool and waterline tile — glass mosaics, porcelain mosaics, and ceramic pool accents. Mesh-mounted sheets and accent pieces for waterlines, steps, spa walls, and pool floors.
Glass and frost-rated porcelain mosaics are the usual picks for a waterline. Confirm frost and chemical ratings against the manufacturer's spec sheet for your specific installation. Glass needs unsanded grout and full, even adhesive coverage — sanded grout scratches it.