Spray-on liners are protective coatings applied to surfaces, commonly used in vehicles, especially truck beds. They are made from a mixture of polyurethane or polyurea, which creates a durable, waterproof barrier that resists scratches, dents, and corrosion. This application process involves spraying the liner onto the surface, allowing it to bond and cure, resulting in a seamless finish. These liners not only enhance the appearance of the surface but also provide added grip and insulation. They are popular among truck owners and outdoor enthusiasts for their ability to protect against harsh weather conditions and heavy use, extending the lifespan of the underlying material.