Cracks in asphalt are not just a cosmetic problem. Every crack is an open channel for water to reach the base layer, and once water gets in, especially in Utah’s freeze-thaw climate, the damage compounds fast. Sealcoating and crack filling are the two most common methods for stopping that process, but they work differently and need to happen in the right order. The combination of sealcoating and crack filling is considered critical for effective preventative maintenance.
Most parking lot problems that require expensive repair started as a crack someone didn’t fill, or a sealcoating job done on pavement that wasn’t ready for it. These asphalt maintenance methods can extend driveway life by 2–5+ years by preventing water penetration, oxidation, and damage, helping to avoid costly repairs in the future.
What Crack Filling Does
Crack filling closes the gaps in your asphalt surface to stop water and moisture from getting underneath. Crack filling employs a flexible, rubberized material to seal cracks and prevent further damage from moisture and water infiltration, making it a cost-effective way to address small cracks and avoid costly repairs in the future.
Water is the primary cause of asphalt deterioration in Utah. When it enters a crack and reaches the base layer, it softens and erodes the material that holds the pavement up from below. In winter, that trapped water freezes, expands, and forces the crack wider. By spring, a hairline crack that could have been addressed for a couple of hundred dollars has become a pothole repair that costs ten times more. Unsealed cracks can lead to further damage, including tears and the need for more extensive repairs in the future.
Not all cracks get treated the same way. Working cracks are cracks that expand and contract with temperature changes. They need a flexible, hot-applied rubberized crack sealant or sealant that can move with the pavement. Hot pour crack filling involves heating rubberized asphalt in a specially designed melter and applying it to cracks, with a quick set time of 10 minutes or less. Static cracks in lower-traffic areas can often be treated with cold-applied crack filling, which typically consists of a clay-filled, polymer-modified asphalt emulsion liquid that flows into cracks at ambient temperatures. The wrong method or product on the wrong crack type leads to early failure, usually within a season.
Proper preparation is crucial for effective asphalt crack repair. The crack sealing process includes evaluating the cracks, preparing them by removing all debris and dirt, cleaning, drying, and measuring the cracks before applying the crack sealant or sealant, and allowing it to cure for optimal results. This ensures proper adhesion and prevents further damage, leading to longer pavement life and preventing moisture from causing additional deterioration.
Alligator cracking is a different situation entirely. Those interconnected surface cracks that look like a checkerboard are a sign of base layer failure, not surface cracking. Filling them doesn’t address what’s happening underneath. The right answer there is patching or resurfacing. Crack filler won’t hold.
What Sealcoating Does for Asphalt Pavement
Sealcoating, also known as seal coating, is a process that applies a protective layer to the surface of an asphalt driveway. This protective layer covers and shields the asphalt from harmful elements such as UV rays, water, oil spills, sun exposure, and other environmental factors. While sealcoating does not repair existing cracks, it acts as a barrier that prevents new damage and deterioration to pavement that is already in decent condition.
A properly applied protective layer from sealcoating safeguards the asphalt against three major degrading factors: UV radiation, water penetration, and petroleum-based fluids like oil and gas drips that can soften the asphalt binder. This protective layer also helps prevent oxidation, water damage, and oil stains, enhancing the overall appearance and curb appeal of the driveway. In Utah, UV exposure and sun intensity are higher due to elevation, making protection against these harmful elements especially important. Asphalt binder, which contains oil, holds the aggregate together and gives asphalt its flexibility, but it breaks down under UV exposure and oxidation, causing the surface to turn gray, become brittle, and start to crack.
Sealcoating improves the durability and protection of the asphalt driveway, helping it withstand heavy traffic and extending its lifespan. Most national guides recommend sealcoating every three to five years. However, in Utah, the combination of high UV exposure, sun, and temperature swings that regularly exceed 100°F between summer highs and winter lows means a two-to-three-year cycle is more realistic for parking lots that see regular traffic.
Sealcoating also restores a fresh, clean look to the surface, covering minor imperfections and improving the overall appearance. For commercial properties and HOAs, a freshly sealed lot with clean striping significantly boosts curb appeal and makes a real difference in how customers and residents perceive the property.
How Long Does Sealcoating and Crack Filling Last?
Expectations vary based on traffic volume and Utah’s climate exposure, but here are the general ranges:
- Hot-applied crack filler in a commercial lot: 3 to 5 years with proper prep. Crack sealing can more than double the life cycle of asphalt pavement by preventing the growth of cracks and keeping new cracks from forming.
- Sealcoating: 2 to 3 years before reapplication is recommended in Utah (longer if traffic is light)
The biggest variable in longevity is preparation, not the product. Preventing water from entering cracks is crucial, as water infiltration, especially during the freeze-thaw cycle and periods of heavy rain, can cause cracks to expand and pavement to deteriorate rapidly. For deeper cracks (typically over 0.5 inches), using sand as a filler before applying crack sealant helps ensure a durable repair, while smaller cracks may only require sealant. Crack filler applied to a dirty or wet surface bonds poorly and fails early, often within the first winter. The product gets the blame, but the prep was the problem. The same holds for sealcoat: a surface that isn’t clean and dry before application will peel early regardless of material quality. Proper crack filling and sealcoating not only protect against water damage but also create a smooth surface, covering minor imperfections and enhancing the overall appearance.
Signs Your Parking Lot Needs Crack Filling
- Visible cracks wider than a hairline anywhere in the lot
- Cracks along the edges of the lot (common in Utah lots that experience frost heave)
- Any crack that has darkened from water absorption
- Cracks appearing in a network pattern (address before they connect and become alligator cracking)
Signs Your Parking Lot Needs Sealcoating
- Surface has turned gray or light brown (oxidized binder)
- Aggregate is becoming loose or granular on the surface
- Previous sealcoat is worn through in high-traffic areas (drive lanes, entry points)
- It’s been more than 2 to 3 years since the last application
The Cost of Waiting
Crack filling is an inexpensive solution when cracks are small and isolated, and sealcoating is a cost-effective solution when the asphalt surface is intact. Regular maintenance of asphalt pavement and asphalt surfaces saves money and helps you avoid costly repairs down the road. The cost curve moves sharply once base damage starts.
A crack sealing treatment on a commercial lot typically costs a fraction of a single pothole repair. Base repair, when the subsurface has been compromised by sustained water infiltration, runs into thousands of dollars depending on the area affected. A maintenance schedule that includes crack filling every few years and sealcoating every two to three years almost always costs less over a decade than reactive repair, helping you save money and prevent costly repairs.
Contact Rocky Mountain Striping For Your Next Sealcoating or Crack Filling Job
Making an informed decision about your maintenance options is essential to protect your investment and ensure the longevity of your asphalt pavement. The pavement that gets maintained predictably is the pavement that holds up. The pavement that gets deferred is the pavement that eventually needs to be replaced.
Rocky Mountain Striping handles crack filling and sealcoating for commercial parking lots throughout Utah. Our team works around your schedule to minimize disruption, and we can assess your lot’s current condition and recommend the right sequence for your property. Get a Free Quote!
