Seal Coating becomes necessary when asphalt begins to show signs of fading, surface cracking, or a dry, brittle texture. Left unprotected, asphalt absorbs water that freezes and expands in winter, causing cracks to grow and the surface to break apart. In Charleston and surrounding Kanawha Valley communities, the freeze and thaw cycles each season put serious stress on unprotected pavement, making regular sealing one of the most cost effective ways to avoid expensive repairs.