Sure Step 1 gal. Clear Acrylic Anti-Slip Interior/Exterior Concrete Paint SU-001 - The Home Depot
Anti-Slip Spray for Increased Grip on Fiberglass, Acrylic, Concrete and Tiles – Clear Non-Slip Coating for Shower, Bathtubs & Floors: Tub Non Slip Stickers: Amazon.com: Industrial & Scientific
Polish Grip NonSlip Penetrating Sealer Highly Polished Stone Floors