Pavement sealers are protective coatings applied to asphalt surfaces, such as driveways and parking lots. They help to prevent damage from weather, UV rays, and oil spills, extending the life of the pavement. Sealers can also enhance the appearance of the surface, giving it a fresh, black look. There are different types of pavement sealers, including coal tar sealers and asphalt emulsion sealers. Each type has its own benefits and application methods. Regular sealing, typically every 1 to 3 years, is recommended to maintain the integrity and aesthetics of the pavement.