Pressure-sensitive adhesives (PSAs) are a type of adhesive that bonds to surfaces when pressure is applied, without the need for heat or solvents. They are commonly used in products like tape, labels, and stickers, allowing for easy application and removal. PSAs work by forming a bond with the surface upon contact, making them versatile for various materials. These adhesives are made from a combination of polymers, which provide flexibility and durability. PSAs can be formulated for specific applications, such as medical tapes or industrial labels, ensuring they meet the required performance standards for adhesion and environmental resistance.