How to Fill Asphalt Cracks Before Sealing: A Comprehensive Guide

Filling asphalt cracks before sealing is crucial for maintaining a durable and smooth pave surface. This step ensures longevity and optimal performance of your asphalt surface. Here’s a detailed guide on how to perform this task effectively.

Introduction to Filling Asphalt Cracks

Filling cracks is a preventive maintenance measure that can extend the life of asphalt surfaces significantly. By addressing cracks early, you prevent water intrusion and further damage, ensuring a smoother and more reliable pave surface.

Materials Needed

Crack filler liquid or rubberized emulsion Asphalt patching compound for larger cracks Wire brush or broom Asphalt cleaner or degreaser (for removing oil or grease) Heat source (if using rubberized filler) Putty knife or trowel Safety gear (gloves, goggles)

Step-by-Step Guide to Filling Asphalt Cracks

1. Clean the Area

Use a wire brush or broom to remove any loose debris, dirt, or vegetation from the cracks. If necessary, use an asphalt cleaner or degreaser to ensure the area is free of oil or grease.

2. Inspect the Cracks

Determine the size of the cracks: For small cracks (less than 1/2 inch wide), liquid crack filler is usually sufficient. For larger cracks (more than 1/2 inch), an asphalt patching compound may be needed.

3. Prepare the Filler

If using a rubberized crack filler, heat it according to the manufacturer’s instructions. Liquid fillers can be used directly from the container.

4. Apply the Filler

For small cracks: Pour the liquid crack filler into the crack, filling it to the top. Use a putty knife to smooth it out if necessary. For larger cracks: Apply the asphalt patching compound using a trowel. Press it firmly into the crack and smooth it out to be level with the surrounding surface.

5. Allow to Cure

Follow the manufacturer’s instructions for curing time. It’s essential to let the filler set properly before sealing the asphalt.

Sealing the Asphalt

Once the crack filler is fully cured, proceed with sealing the asphalt surface as per the sealing product instructions.

Tips for Effective Crack Filling and Sealing

Weather Considerations

Choose a dry day with temperatures above 50°F (10°C) for best results.

Safety First

Always wear gloves and goggles when handling asphalt products.

Alternative Filling Techniques in India

In India, fog seal application is commonly used for fine cracks. Emulsion of SS grade is sprayed, typically at a rate of about 9 Kg per m2. The quantity may vary based on site requirements, such as warm-up of the emulsion under cold conditions.

For medium to wide cracks, a slurry seal is used. There are two grades for this purpose:

Conclusion

By following these steps, you can effectively fill cracks in asphalt and prepare it for sealing, extending the life of your asphalt surface.