Spray-On Bed Liner is a protective coating applied to the bed of a truck to prevent damage from scratches, dents, and rust. This durable material is typically made from polyurethane or polyurea, providing a strong barrier against harsh weather and heavy loads. The application process involves spraying the liner directly onto the truck bed, creating a seamless and custom fit. This method ensures complete coverage, unlike traditional drop-in liners, which can leave gaps. Spray-On Bed Liners are popular among truck owners for their longevity and ability to enhance the vehicle's resale value.