Parking Lot Sealcoating in Fort Collins, CO

Sealing a parking lot uses the same materials as a driveway job, but it runs on a business's clock and at a scale where the product choice has consequences downstream. In Fort Collins a lot is a stormwater surface first. The city's stormwater charge rises with the share of a property that is impervious, up to a runoff factor of 0.95 for the most heavily paved sites, and water leaving storm sewers reaches creeks and the Poudre without treatment. Good parking lot sealcoating therefore starts with the product in the tank and with crack filling, not with the coat itself. FixAsphalt gives two to four years between coats for commercial pavement.

Coal tar is not banned anywhere in Colorado on the national list kept by Coal Tar Free America, but a lot is where the question matters most. The USGS measured PAHs in house dust 25 times higher in apartments whose lots were sealed with coal tar than in apartments beside other lot surfaces, and runoff from coal-tar-sealed pavement stayed toxic to test organisms for as long as 42 days. For apartment complexes, schools, day cares and any lot draining toward a creek or ditch, an asphalt-emulsion or acrylic sealer sidesteps the issue, and a property manager can write that requirement into the bid.

Scheduling runs into the calendar. On the CSU campus normals, nights stay mostly above 50 degrees only from June through August, the months that suit SealMaster's 50-and-rising rule, so lot owners compete for the same summer weekends. Sections are coated in turn while the rest of the lot stays open, each needing a full day before cars under SealMaster's guidance, with two coats overall and a third on drive lanes and entrances. Restriping follows once the sealer has cured, which is why a two-day window is the usual unit of booking.

Winter sets the wear pattern. Fort Collins prohibits businesses from pushing snow into streets or the public right-of-way, so lot snow gets stacked on the lot itself, often on the same stalls every year, and property owners must clear adjoining sidewalks within 24 hours after a snowfall. Stacks that melt slowly feed water into the pavement for weeks, and plow blades riding over high spots scrape off coating and paint. A walk of the lot after the March snows shows where crack filling should be concentrated before the summer seal.

FixAsphalt's figures put basic lot sealing at $0.14 to $0.25 per square foot with asphalt or coal-tar emulsion, $0.60 to $0.80 with crack sealing, and $0.65 to $0.90 with crack sealing and striping, with a small lot of 4,000 to 7,000 square feet at $1,200 to $2,100. The cost page lists the other sources for comparison.