Resins are natural or synthetic substances that are typically sticky and viscous. They are produced by various plants, especially trees, as a defense mechanism against injury or infection. Common examples include pine resin and amber, which have been used for centuries in products like varnishes, adhesives, and incense. In addition to natural resins, there are many synthetic varieties used in modern manufacturing. These synthetic resins, such as epoxy and polyester, are crucial in creating durable materials for construction, automotive, and electronics industries. Their versatility makes them essential in everyday products, from coatings to composite materials.