Asphalt Sealant Application and Benefits
We are a leading manufacturer and exporter of all types of asphalt sealants and hard asphalt joint sealants. These products are made by oxidizing and blowing asphalt, resulting in reliable materials used in road maintenance and waterproofing projects.
What Is Hard Asphalt Joint Sealant?
Hard asphalt sealant, also known as blown asphalt or oxidized bitumen sealant, is created by modifying asphalt with elastomeric materials. These materials are either mixed using a solvent like white spirit, toluene, or xylene, or melted together. The resulting hot-melt or cold-applied sealant ensures strong adhesion and durability across a wide temperature range.
Applications of Asphalt Sealant
- Crack sealing and repair
- Joint sealing in concrete/asphalt
- Surface protection and waterproofing
- Road construction and maintenance
- Electrical cable cover and roofing
- Pipeline corrosion protection
Key Properties
High-performance asphalt sealants provide elasticity, flexibility, strong adhesion, and resistance to weathering and mechanical stress. These sealants prevent water intrusion, reduce freeze-thaw damage, and increase road longevity.
How to Clean Joints Before Sealing
- Remove old sealants, dust, and debris to a depth of at least 20 mm.
- Use oil-free compressed air to clean surfaces immediately before applying new material.
Crack Cleaning Guidelines
- Clean cracks between 2–25 mm wide in concrete and asphalt surfaces.
- Route narrow cracks to at least 10 mm wide and 20 mm deep.
- For wider cracks, route to 25–30 mm wide and 12–20 mm deep.
- Use oil-free air jets to clear all particles before sealing.
Sealing Procedures
- Apply sealant evenly in cracks and joints, ensuring full fill.
- Use mechanical joint fillers with continuous mixing for large projects.
- Avoid overfilling and apply sealant at temperatures above 4°C.
- Do not reopen to traffic until the sealant has cooled completely.
Filling Large Longitudinal Cracks
- Clean cracks wider than 25 mm to a depth of 60 mm.
- Compact filler flush with pavement after cleaning.