Seal coating will help prevent cracking and surface deterioration of your asphalt. Doug's Seal Coating will do it right! Serving Oakland County. Every job includes power cleaning (including grass and weed removal) and neat application of one thick coat of sealer with silica sand added for improved traction and slip resistance. Rubberized crack filling - both hot and cold, asphalt repair and patching and striping. Locally owned and operated. Over 20 years of experience. FREE estimates.