Staying on top of cleaning and resealing allows your pavers to always look like new. Having a sealant applied regularly helps prevent erosion of the pavers and most types of damages that could lessen the lifespan of the pavers. Some examples of damage are fading, erosion, mildew, mold, and overall surface traction. These potential issues can be easily resolved with a high quality sealant. Another option to consider and Reel Hosepower always recommends is purchasing a non-slip additive to keep your pavers safe for both your family and visitors as well. The higher end sealant brands already incorporate this technology which is a huge plus.