Sealants and adhesives are materials used to bond surfaces together or to fill gaps. Sealants are typically used to prevent the passage of air, water, or other substances, making them ideal for applications like windows and roofs. They remain flexible after curing, allowing for movement without breaking the seal. Adhesives, on the other hand, are designed to create a strong bond between two surfaces. They can be used in various industries, including construction and manufacturing, to join materials like wood, metal, and plastic. Common types of adhesives include epoxy, polyurethane, and cyanoacrylate.