Asphalt is a porous material, susceptible to oxidation from the sun and damage from water penetrating beneath the surface of the asphalt. Also chemicals such as gasoline, diesel fuel, oil, antifreeze and even salt. Asphalt pavement will also ravel away after time. Seal coating not only makes your pavement look new, it protects it from oxidation as well as petroleum spills. Seal coating extends the life and protects your investment in your new pavement.