Phenolic resins are synthetic polymers made from the reaction of phenol and formaldehyde. They are known for their strong adhesive properties, heat resistance, and durability, making them suitable for various applications, including coatings, laminates, and molded products. These resins can be categorized into two main types: thermosetting and thermoplastic. Thermosetting phenolic resins harden permanently when heated, while thermoplastic versions can be reshaped upon heating. Their versatility and performance make them valuable in industries such as automotive, construction, and electronics.