Cracks in asphalt not only are unsightly, they allow water to travel to the base below causing potholes, as well. Prevent potholes and keep cracks in check by applying asphalt sealer every three or four years. Asphalt sealer, also known as emulsified asphalt, generally is available in a ready-to-pour 5-gallon bucket. While asphalt sealer will take care of the small cracks, larger cracks should first be filled with an asphalt caulking compound. Cracks wider than half-an-inch should be filled with a paste made from sand and emulsified asphalt. Pot holes and larger repairs can be made using asphalt cold patch. And that's the On The House tip for today.