Crack Sealing & Sealcoating in Rapid City, SD

Crack sealing and sealcoating are maintenance, and in Rapid City they are the best money you can spend on asphalt. Crack sealing fills open cracks with hot, rubberized sealant that stays flexible in cold weather. Sealcoating covers the whole surface with a thin protective layer against sun, water and fuel drips. Neither adds strength, so both belong on pavement that is still structurally sound.

Why cracks matter so much here

Chinook winds push winter temperatures above 50 degrees about 20 times between December and February, and nights fall back below freezing. Every one of those cycles lets water into a crack and then freezes it there. Sealing cracks in late summer or early fall, before the first freeze, which in Rapid City typically falls around October 4, keeps that water out of the base.

How crack sealing is done

Cracks are blown out with compressed air or routed to give the sealant a clean channel. Hot sealant is poured in and leveled. HomeGuide lists crack filling at roughly $0.50 to $3 per linear foot. Wide cracks with broken edges, or cracks that form a web, need patching instead.

Sealcoating

At the Black Hills' elevation and with about 2,857 hours of sunshine a year in Rapid City, the surface oxidizes, turns gray and starts to lose stones. Sealcoating slows that. HomeGuide advises waiting 3 to 6 months after paving, then resealing every 2 to 10 years depending on product and climate. A practical sign is color: gray surface and visible stones mean it is time.

Weather window

Sealer needs dry pavement and temperatures between about 50 and 95 degrees, per HomeGuide, and most products need 12 to 72 hours before cars can drive on them. Fast-dry products need it warmer and drier. In Rapid City that usually means late spring through early fall, watching for afternoon thunderstorms.

Prep

• Blowing the surface clean, including edges
• Scraping and priming oil spots
• Sealing cracks first
• Cutting in by hand at garage floors, walks and curbs
• Blocking off the area until it cures

Skipping prep is the main reason seal coats peel within a year.

For lots

We seal lots in sections so part stays open, then restripe. HomeAdvisor lists commercial sealcoating at $0.15 to $0.30 per square foot.

A simple maintenance calendar

• Spring: walk the pavement after the snow is gone and note new cracks and soft spots
• Early summer: patch any failed areas
• Mid to late summer: sealcoat if the surface has faded
• Late summer to early fall: seal cracks before the first freeze
• Winter: keep plow blades off edges and avoid chemical piles on the asphalt