Release liners is also called a carrier or backing paper, it is used to carry or hold onto the sticky substrate until it is ready to release. It can be paper-based, film-based, and poly-coated-paper based or even contain unique substrate such as metalized films as their base. Release liner substrate is mostly coated with silicone that enables whatever the liner is carrying to release when the time is right. They are widely used across medical applications such as metalized papers/films as their base. Industrial application of liners covers weatherproofing, roofing shingles, and insulation products.