A release liner is a backing material coated with a release agent, allowing adhesives, tapes, and labels to peel off smoothly. Used in industries like packaging, medical, and automotive, it prevents adhesives from sticking prematurely. Common materials include paper, film, and silicone-coated options, each offering unique benefits. Release liners improve efficiency in manufacturing and ensure product integrity. Choosing the right liner depends on factors like durability, flexibility, and application needs.