Crack sealing is one of the most effective ways to extend the life of asphalt pavement, but not every defect can be repaired with traditional crack sealant. When cracks become too wide or pavement damage becomes more severe, mastic asphalt may be needed to provide a durable, long-lasting repair.
For contractors and municipalities, mastic asphalt can be an effective solution for extending pavement life and delaying total asphalt replacement.
What You’ll Learn
- Advantages of Using Mastic for Asphalt Pavement Repairs
- What is Mastic Asphalt?
- Common Applications
- Advantages of Using Mastic Asphalt
- Choosing the Right Mastic Product
- Applying Mastic with the Right Equipment
- When Should You Choose Mastics?
- Learn More About Crack Filling Equipment
- SealMaster Support & Expertise
What Is Mastic Asphalt?
Asphalt mastic is a multi-purpose, hot-rubberized pavement patching material composed of asphalt binder, mineral fillers and carefully graded aggregates. The inclusion of aggregate provides mastic with greater structural strength than traditional hot-pour crack sealants, allowing it to create a flexible, load-bearing repair that restores the pavement surface.
Once mastic materials are heated to the appropriate application temperature, it is applied directly to damaged areas, where it bonds with the surrounding asphalt. After it cools, it forms a durable and flexible repair that can withstand repeated traffic loads, while also preventing water and debris from penetrating the pavement.
Common Applications
Asphalt mastic is commonly used for:
- Large, wide cracks
- Bridge joints
- Small potholes
- Manhole cover areas
- Surface spalling
- Utility joints
- Distressed pavement
- And more!
Areas in need of mastic repairs require more than traditional crack-filling methods. Mastic restores distressed pavement so it can continue to withstand heavy traffic.
Advantages of Using Mastic Asphalt
Repairs Larger Pavement Defects
Unlike traditional crack sealants, mastic asphalt is designed to repair pavement damage that extends beyond narrow cracks. It fills wide cracks, utility cuts, bridge joints, surface spalling and other localized pavement defects, restoring structural integrity before more extensive rehabilitation becomes necessary.
Built to Withstand Heavy Traffic
The aggregate reinforcement in mastic asphalt provides the structural strength needed to support repeated traffic loads without rutting, settling or breaking apart under normal service conditions. This makes it well suited for high-traffic areas such as roads, intersections, parking lots, commercial entrances and other locations where durability is essential.
Helps Prevent Water Infiltration
Water is one of the leading causes of pavement deterioration. Mastic asphalt bonds directly to the surrounding pavement, creating a durable barrier that helps prevent water and debris from penetrating the repair area. By reducing moisture infiltration, it helps protect the pavement base and minimize future cracking, potholes and other forms of pavement failure.
Reduces Future Maintenance Costs
Making the right repair the first time can help reduce labor, material costs and repeat maintenance. Because mastic asphalt is designed for structural pavement repairs, it provides a longer-lasting solution for larger defects than traditional crack sealants, helping contractors and municipalities maximize their maintenance budgets.
Creates a Smooth, Traffic-Ready Surface
The heated material flows easily into pavement defects and typically requires little to no compaction. As it cools, it forms a smooth, even repair that restores ride quality while helping maintain safe driving and walking surfaces.
Supports Pavement Preservation
Addressing localized pavement failures before they continue to deteriorate is a key part of any pavement preservation program. Asphalt mastic helps extend pavement life by restoring damaged areas before they require more costly repairs or full-depth replacement. When properly installed, mastic repairs can provide years of dependable performance under normal traffic conditions.
Returns Pavement to Service Quickly
Minimizing downtime is critical for contractors, municipalities and property owners alike. Once mastic asphalt cools to ambient temperature, repaired areas can typically be reopened to traffic, helping reduce lane closures, business disruptions and project delays.
Choosing the Right Mastic Product
Not all asphalt mastic products are designed for the same application. Selecting the appropriate formulation helps ensure the repair performs as intended while improving durability and long-term pavement performance.
SealMaster’s CrackMaster® line of hot-applied asphalt mastic products includes specialized formulations for a variety of pavement maintenance applications, allowing contractors and municipalities to choose the right material for each repair.
CrackMaster® Mastic Black
General Mastic Repairs
Engineered for structural asphalt pavement repairs, CrackMaster® Mastic Black is a hot-applied, polymer-modified mastic reinforced with graded aggregates, steel fibers and recycled tire rubber. It is designed to repair wide cracks, utility cuts and other pavement defects that require greater structural strength than traditional hot-pour crack sealants.
CrackMaster® Mastic Gray
Concrete Repairs
CrackMaster® Mastic Gray is formulated for concrete pavement repairs. Its synthetic polymer-modified resin and aggregate blend provide a flexible alternative to traditional cementitious repair materials, helping reduce cracking and premature failures caused by rigid patching methods.
CrackMaster® Mastic PL Parking Lot
Parking Lot Repairs
Designed specifically for commercial parking lots and similar paved surfaces, CrackMaster Mastic PL Parking Lot restores wide cracks and localized pavement defects while helping prevent water infiltration and improve ride quality.
CrackMaster® Mastic Roads
Road, Street & Highway Repairs
Developed for municipal streets, highways and other high-traffic roadways, CrackMaster Mastic Roads is formulated to withstand demanding traffic conditions while restoring deteriorated pavement and helping extend service life.
Applying Mastic with the Right Equipment
Proper application plays a major role in the performance of any asphalt mastic repair. Maintaining consistent material temperatures and applying mastic evenly helps create durable, long-lasting repairs that stand up to heavy traffic and changing weather conditions.
SealMaster offers a complete line of Crack Pro® oil-jacketed crack-filling equipment, providing contractors and municipalities with solutions for everything needed for traditional crack-filling and mastic repairs.
The Crack Pro® Mastic Machine is a 300-gallon applicator engineered for efficiency and safety when repairing large cracks, bridge joints, plug joints, manhole cover areas, utility joints and more. It features a diesel-powered heating system that eliminates the need for propane while delivering fast heat-up times and low operating costs. Its oil-jacketed kettle and heavy-duty agitation system maintain consistent material temperatures throughout the workday, helping ensure uniform application and dependable repair quality.
Operator safety and ease of use are equally important. The machine features integrated safety interlocks, advanced temperature controls, overnight heaters for faster startup and a heated discharge chute that stays hot without propane or hot oil. A large 30-gallon fuel tank provides up to 25 hours of operation between fill-ups, allowing crews to spend more time repairing pavement and less time servicing equipment.
When Should You Choose Mastics?
Mastic is ideal for pavement repairs that require more than just sealing standard cracks. It is particularly effective for addressing wide cracks, utility cuts, surface spalling, and localized pavement deterioration. Mastic provides the structural strength necessary to restore the pavement and withstand traffic.
On the other hand, traditional hot-pour crack sealants are preferred for cracks that expand and contract with temperature changes. Understanding the differences between these two repair methods can help contractors and municipalities select the appropriate material for each job, ultimately improving pavement performance and maximizing the service life of every repair.
It’s important to note that asphalt mastic is not intended to replace hot-pour or cold-pour crack sealants. Instead, it serves as an additional option in a comprehensive pavement maintenance program. By knowing when to use mastic and when to utilize hot-pour crack sealants, contractors and municipalities can make longer-lasting repairs, enhance pavement performance, and maximize the return on every maintenance dollar spent.
Learn More About Crack Filling Equipment
Mastic asphalt is one part of a comprehensive pavement maintenance program. Pairing the right repair material with the right application equipment helps contractors improve productivity, reduce downtime and complete repairs that last.
To learn more about selecting crack-filling equipment, check out our guide on choosing the appropriate tools for your project needs. The article details the various types of crack-filling equipment available, the best applications for each machine, and the essential factors contractors should consider when investing in equipment for sustainable growth.
Read next: Choosing the Right Crack-Filling Equipment for Pavement Maintenance
SealMaster Support & Expertise
From hot-pour crack sealants to hot-rubberized aggregate-filled asphalt mastic, SealMaster offers a complete line of professional pavement repair materials designed for a wide range of pavement maintenance applications. SealMaster also manufactures a wide array of industry-leading equipment, giving contractors, municipalities and property owners the tools they need to complete high-quality repairs efficiently and safely.
With more than 160 manufacturing and distribution locations worldwide, SealMaster provides expert product recommendations, equipment support and local service to help customers select the right pavement repair solution for every project.
To learn more about CrackMaster® mastic products, Crack Pro® equipment or to find your nearest SealMaster location, contact your local SealMaster or call 800-395-7325.