Quick answer
Asphalt sealant is a protective coating applied to asphalt surfaces to enhance their durability and appearance.
- Purpose: It seals the surface to protect it from water damage, UV rays, oil spills, and chemical exposure.
- Composition: Typically made from asphalt emulsion, coal tar, or rubberized materials.
- Benefits:
- Prevents cracking and wear.
- Improves appearance with a black, shiny finish.
- Extends the lifespan of asphalt surfaces.
- Application: Usually applied by spraying or squeegeeing onto clean, dry surfaces in thin layers.
Asphalt sealant is commonly used for driveways, parking lots, and roadways to maintain the integrity and extend the life of asphalt surfaces.
When you see a freshly paved road or a beautifully smooth driveway, what makes it look so perfect? Asphalt sealant plays a crucial role in maintaining that smooth, glossy finish while protecting the pavement from wear and tear. If you’re wondering, “What exactly is asphalt sealant?” you’re in the right place. Whether it’s for your home driveway or a commercial parking lot, asphalt sealant provides lasting protection and enhances the longevity of your pavement.
But is it really worth the investment? What benefits does it offer? How do you apply it correctly? This guide will answer all those questions and more!
What is Asphalt Sealant?
Asphalt sealant is a liquid coating that’s applied to asphalt surfaces to protect them from damage caused by the environment, weather, and traffic. This black, viscous substance acts as a barrier, preventing water, oil, and other harmful substances from penetrating and damaging the asphalt. It also protects against the sun’s UV rays, which can cause cracks and deterioration over time.
Why is Asphalt Sealant Important?
You might be wondering: Isn’t asphalt durable enough on its own? Well, asphalt can be pretty strong, but like anything exposed to the elements, it deteriorates over time. Without a protective layer, your driveway or parking lot can start cracking, fading, and even developing potholes. Asphalt sealant helps preserve the surface by shielding it from moisture, chemicals, and the sun’s harmful rays.
What Are the Benefits of Using Asphalt Sealant?
If you’re still unsure about applying asphalt sealant to your property, here’s why it’s a great idea:
1. Prevents Water Damage
Water can seep into the tiny cracks in your asphalt, which, over time, leads to larger cracks and potholes. Asphalt sealant helps prevent water from entering, saving you from expensive repairs.
2. Protects Against Oil and Gas Spills
For driveways and parking lots, oil and gasoline spills are common. Asphalt sealant creates a layer that keeps these fluids from soaking into the asphalt, where they can cause significant damage.
3. Enhances Appearance
The glossy finish of a freshly sealed driveway or parking lot can make it look brand new. Asphalt sealant restores the deep black color of the surface, giving it a fresh, appealing appearance.
4. Extends the Life of Asphalt
By protecting your asphalt from damage, sealants help prolong the lifespan of your pavement. Proper maintenance with regular sealing can add years to the life of your driveway or parking lot.
5. Improves Durability
Sealants help the asphalt surface withstand daily wear and tear. Whether it’s foot traffic, vehicle weight, or extreme weather, asphalt sealant acts as a protective shield.
How Does Asphalt Sealant Work?
Asphalt sealant works by bonding to the asphalt surface, creating a smooth and uniform coating. It’s typically made from a combination of bitumen (a byproduct of crude oil), water, and additives that enhance its ability to withstand different weather conditions.
When you apply sealant, it soaks into the porous surface of the asphalt, creating a protective layer that’s highly resistant to water and chemicals. The best part? It can even reduce the amount of sun damage and cracking caused by UV rays.
When Should You Apply Asphalt Sealant?
Timing is key when it comes to sealing your asphalt. Typically, sealant should be applied every 2-3 years, depending on your climate and how much traffic the surface gets. If you notice signs of wear, like cracks or fading, it might be time for a reapplication.
Best Conditions for Application
The best time to apply sealant is when the temperature is between 50-85°F (10-30°C). This ensures the sealant cures properly. Avoid applying it in the rain or when the weather forecast predicts rain within the next 24 hours.
How to Apply Asphalt Sealant Correctly
Applying asphalt sealant isn’t overly complicated, but there are a few steps to follow to get the best results.
Step 1: Clean the Surface
Before you start applying the sealant, the asphalt surface must be clean. Sweep off any debris, leaves, or dirt. If necessary, use a power washer to remove oil stains, dirt, and grime. Allow the surface to dry completely before proceeding.
Step 2: Repair Cracks and Holes
If there are any cracks or holes in the surface, fill them in with a patching compound. This helps the sealant bond evenly across the entire surface.
Step 3: Stir the Sealant
Before applying, stir the sealant thoroughly to ensure an even consistency. Some sealants might require thinning, so check the manufacturer’s instructions for any specific recommendations.
Step 4: Apply the Sealant
Use a squeegee or brush to spread the sealant evenly across the asphalt. For larger areas, a sprayer can be used to apply the sealant quickly. Be sure to apply in thin, even layers, and avoid applying too much at once.
Step 5: Let It Dry
Once the sealant is applied, allow it to dry for at least 4-6 hours before walking on it, and up to 24 hours before driving on it. Don’t rush the drying process – proper curing ensures maximum protection.
Which Asphalt Sealant is Best?
Choosing the right asphalt sealant can make a big difference in the results. There are two main types of sealants to consider:
1. Coal Tar Sealants
Coal tar-based sealants are one of the most popular choices. They offer great protection against water and chemicals and are ideal for commercial and high-traffic areas. However, they can emit strong fumes during application and contain some controversial chemicals.
2. Asphalt Emulsion Sealants
Asphalt emulsion sealants are a more eco-friendly option. They’re water-based, making them safer to apply and less harmful to the environment. They offer decent protection but might not be as durable as coal tar-based sealants in high-traffic areas.
What Are the Costs of Asphalt Sealant?
The cost of asphalt sealant varies depending on the quality of the product and the size of the area you need to cover. On average, you can expect to pay between $0.15 and $0.30 per square foot for materials. If you’re hiring a professional to apply the sealant, labor costs can increase the total price.
Although it may seem like an added expense, using asphalt sealant can save you money in the long run by preventing costly repairs and extending the life of your pavement.
How Long Does Asphalt Sealant Last?
Typically, asphalt sealant will last 2-3 years, depending on the weather conditions, traffic, and how well it was applied. However, regular reapplication can keep your driveway or parking lot looking fresh and performing well for many years.
Common Mistakes to Avoid When Applying Asphalt Sealant
Even though applying sealant is fairly straightforward, mistakes can happen. Here are some common errors to avoid:
- Skipping surface preparation – Cleaning and repairing the surface before applying sealant is crucial for a smooth, lasting finish.
- Applying too much sealant – Applying too thick of a coat can lead to peeling or uneven coverage.
- Not allowing enough drying time – Rushing the drying process can affect the sealant’s effectiveness.
Do You Know? Fun Facts About Asphalt Sealant
- Did you know that asphalt sealants can reduce heat absorption by as much as 30%? This helps keep the surface cooler during hot summer months.
- Fun fact: Sealcoating a driveway can increase its lifespan by up to 20 years with proper care.
- Asphalt sealant can improve your pavement’s traction, making it safer to walk or drive on.
FAQs About Asphalt Sealant
1. What is the difference between coal tar and asphalt emulsion sealant?
Coal tar is more durable but contains chemicals, while asphalt emulsion is eco-friendly but may not last as long in high-traffic areas.
2. How often should asphalt sealant be applied?
Every 2-3 years is the typical recommendation, depending on traffic and weather conditions.
3. Can I apply sealant to an old, cracked driveway?
Yes, but it’s essential to repair any cracks before applying the sealant to ensure proper bonding.
4. Is asphalt sealant harmful?
Most modern sealants are safer and less harmful than older formulas, but it’s always a good idea to use them in well-ventilated areas.
5. How long does asphalt sealant take to dry?
It typically takes 4-6 hours for the surface to dry, but it’s best to wait 24 hours before driving on it.
6. How much does it cost to seal a driveway?
On average, sealing costs between $0.15 and $0.30 per square foot for materials.
7. Can I seal my driveway myself?
Yes, applying asphalt sealant is something most homeowners can do themselves with the right tools and preparation.
8. Can asphalt sealant be used on parking lots?
Yes, sealant is commonly used on parking lots to protect large asphalt surfaces.
9. Does asphalt sealant prevent cracking?
While it helps reduce the risk of cracking, it can’t prevent all types of damage, especially in areas with heavy traffic or extreme weather.
10. Can asphalt sealant fix existing cracks?
No, sealant can’t repair cracks. It’s important to fill cracks before applying sealant for the best results.
Conclusion
Asphalt sealant is a simple yet highly effective way to maintain and extend the life of your driveway or parking lot. Not only does it improve the surface’s appearance, but it also protects against water, chemicals, and the sun’s harmful rays. By following the proper steps for application and regularly maintaining your pavement, you’ll save time and money on expensive repairs.
So, next time you think about sealing your driveway, remember the benefits – it’s a small investment for long-term protection!
