Kauçuk, also known as rubber, is a natural polymer derived from the sap of the rubber tree (Hevea brasiliensis). This milky fluid, called latex, is harvested by tapping the tree and is primarily used to produce various rubber products, including tires, footwear, and industrial materials. The properties of kauçuk make it highly elastic and durable, which is why it is widely used in many applications. Synthetic alternatives also exist, but natural kauçuk remains important due to its unique characteristics and renewable nature, contributing to both economic and environmental sustainability.