Gleason and Associates Inc. in Detroit, Michigan, are ready to transform your parking lot into a beautiful, drivable work of art. From asphalt seal coating to catch basin creation, our team enhances, maintains, and repairs parking lots around the area at an affordable price. Why do people sealcoat? The most important time to sealcoat is within one year of a newly paved surface or within four weeks of a newly patched parking lot. This time delay allows the sealer to trap in the oils in the fresh asphalt helping the asphalt retain its natural flexibility, and this staves off cracking and pot holing for a longer period of time.