Polyurethane adhesives are versatile bonding agents made from a polymer compound that can adhere to a wide range of materials, including wood, metal, plastic, and ceramics. They are known for their strong, flexible bonds and resistance to moisture, heat, and chemicals, making them suitable for both indoor and outdoor applications. These adhesives come in various forms, such as liquid, foam, or tape, and can be used in construction, automotive, and crafts. Their curing process typically involves a reaction with moisture in the air, allowing them to set and achieve maximum strength over time.