Duluth and Superior area seal coating, blacktopping, and asphalt maintenance has special challenges. Our vast Twin Ports area asphalt experience helps us to help you protect your valuable blacktop investment. Since 1989, A-1 Asphalt Co. of Duluth and Superior has nearly 1,000 satisfied residential and business customers. From major parking lot maintenance for companies like Walgreens, Superior Choice, Duluth Electric, and numerous other businesses and churches to nearly a thousand residential driveways, we treat all projects the same: We listen to our customers, apply a quality product, and do the job right. Free estimates and your satisfaction are always guaranteed. Please call us with any asphalt seal coating or renewal, renovation, or maintenance work.