Our Pool Depth Markers are made specifically for daily use near water. These durable vinyl markers feature an acrylic adhesive backing that ensures a secure, waterproof bond on most poolside surfaces. You won't have to worry about deterioration or losing your sign in the pool. The 20 mil thick markers stick close to the surface and promise at least 2-year outdoor durability. Our Pool Depth Markers are suitable for long-term use, even in high-traffic areas. You may watch this video to learn more about our SlipSafe Pool Markers.