Seal coating is a vital maintenance task for anyone with an asphalt driveway or parking lot. This process involves applying a protective liquid layer over the pavement to shield it from the damaging effects of the environment. By investing in seal coating services, you can significantly extend the lifespan of your asphalt and maintain a clean, professional appearance for your property.
Asphalt surfaces are prone to wear and tear from sunlight, water, and automotive chemicals. Without regular maintenance, the surface can become brittle, leading to cracks, potholes, and eventually a full replacement. This guide will walk you through everything you need to know about seal coating services and why they are essential for your property.
What Is Seal Coating?
Seal coating is the process of applying a protective coating to asphalt-based pavements. This coating is typically made of a mixture of emulsified asphalt, water, mineral fillers, and various additives. It acts as a barrier, preventing harmful elements from penetrating the surface of the asphalt.
Think of seal coating like a fresh coat of paint on a wooden house or wax on a car. It provides a sacrificial layer that wears down over time, protecting the structural integrity of the material underneath. When the seal coat begins to fade, it can be reapplied to maintain continuous protection.
The Primary Benefits of Seal Coating Services
Many property owners view seal coating as a purely aesthetic choice, but its benefits go much deeper. While it does make your driveway look brand new, the functional advantages are the real reason to hire a professional service.
Protection Against UV Rays
The sun’s ultraviolet rays are one of the biggest enemies of asphalt. Constant exposure to UV light causes a process called oxidation, which breaks down the chemical bonds that keep the asphalt flexible. This leads to a grey, faded appearance and makes the surface more susceptible to cracking.
Water Resistance
Water is the leading cause of pavement failure. Seal coating fills the small voids and cracks in the asphalt surface, preventing water from seeping into the base layers. In colder climates, this is especially important to prevent the freeze-thaw cycle, where water expands as it freezes and tears the pavement apart.
Resistance to Oil and Chemical Spills
Asphalt is a petroleum-based product, which means it can be dissolved by other petroleum products like gasoline and motor oil. If oil leaks onto an unprotected driveway, it will soften the asphalt and cause it to crumble. Seal coating provides a chemical-resistant barrier that buys you time to clean up spills before they cause permanent damage.
Enhanced Curb Appeal
A fresh seal coat gives your property a clean, dark black finish that looks professional and well-maintained. This can significantly increase the value of your home or business. It also makes the surface smoother, which is easier to sweep and clear of snow.
The Professional Seal Coating Process
When you hire professional seal coating services, they follow a specific series of steps to ensure the coating adheres properly and lasts as long as possible. A rushed or poorly prepared surface will result in the sealant peeling off within a few months.
- Inspection: The technician will check for structural damage, deep cracks, and oil spots that need special attention.
- Cleaning: The surface must be completely free of dirt, debris, and vegetation. Professionals use high-powered blowers, wire brooms, and sometimes pressure washers to prep the area.
- Oil Spot Treatment: Any oil or grease stains are treated with a specialized primer. If these aren’t treated, the seal coat will not stick to those areas.
- Crack Filling: Large cracks are typically filled with a hot-applied rubberized crack sealant. This prevents water from reaching the sub-base.
- Application: The seal coat is applied using either a spray system or a squeegee method. Many pros use a combination of both to ensure even coverage and a smooth finish.
- Curing: The area must be blocked off from traffic. It typically takes 24 to 48 hours for the material to dry and harden completely.
When Should You Schedule Seal Coating?
Timing is critical when it comes to asphalt maintenance. New asphalt should not be sealed immediately; it needs time to “cure” and release excess oils. Most experts recommend waiting 6 to 12 months after a new installation before applying the first coat.
After the initial application, you should generally have your driveway or parking lot resealed every 2 to 3 years. However, this depends on the amount of traffic the surface receives and the local weather conditions. If you notice the asphalt has turned light grey or you see small “spiderweb” cracks forming, it is time to call for service.
Weather also plays a role in the scheduling. Seal coating requires temperatures to be at least 50 degrees Fahrenheit and rising. It cannot be applied if rain is expected within 24 hours, as moisture will wash the sealant away before it sets.
Professional Services vs. DIY
Many homeowners consider seal coating their own driveways to save money. While DIY kits are available at home improvement stores, there are several reasons why professional services are usually the better investment.
Professional contractors use commercial-grade sealants that are much more durable than the products sold to the general public. These professional mixtures often contain additives that improve flexibility and drying time. Additionally, professionals have the equipment to heat crack fillers to the proper temperature, ensuring a permanent bond that DIY cold-fill products cannot match.
Hiring a service also saves you from the messy and labor-intensive nature of the job. Sealant is difficult to wash off if it gets on your skin, clothing, or the side of your house. A professional crew can complete a standard driveway in just a few hours with a perfectly clean edge.
How Much Do Seal Coating Services Cost?
The cost of seal coating depends on several factors, including the size of the area and the current condition of the asphalt. Most companies charge by the square foot. On average, you can expect to pay between $0.15 and $0.30 per square foot.
Factors that may increase the price include:
- Extensive Crack Repair: Filling many large cracks requires more material and labor.
- Heavy Cleaning: If the surface is covered in moss, dirt, or heavy oil stains, the prep work will take longer.
- Number of Coats: While one coat is often sufficient for residential driveways, commercial parking lots usually require two coats for durability.
How to Choose a Reliable Contractor
To get the best results, you should choose a reputable seal coating service. Avoid “door-to-door” contractors who claim to have leftover material from a nearby job. These are often scams that use watered-down sealant.
Always ask for a written estimate and check if the company is insured. A reliable contractor will be happy to provide references or show you examples of their previous work in your area. Make sure they specify which brand of sealant they use and whether they include crack filling in their base price.
Conclusion
Seal coating is an essential part of property maintenance that offers both protection and beauty. By applying a fresh layer of sealant every few years, you prevent expensive damage and keep your asphalt looking its best. It is a cost-effective way to avoid the massive expense of tearing out and replacing a neglected driveway.
If your asphalt is starting to look worn or faded, now is the perfect time to look into professional seal coating services. Taking action today will ensure your pavement remains strong and attractive for years to come. For more tips on home maintenance and property care, feel free to explore our other helpful guides on SearchAndHelp.com.