There are many types of rubber, each with its own specific properties and uses. Here are some of the most popular types of gum:

1. Natural rubber (NR) - it is a rubber latex obtained from rubber trees. It is flexible, durable and has good tensile and tear resistance. Natural rubber is widely used in the automotive, food and pharmaceutical industries.
   
   
2. Styrene butadiene rubber (SBR) - this is a synthetic rubber that is mainly used in the automotive and construction industries. It is characterized by good resistance to abrasion, tearing and aging.
   
   
3. Chloroprene rubber (CR) - also known as neoprene rubber, is a synthetic rubber material that is used in the chemical, automotive and construction industries. It is resistant to temperatures and weather conditions such as UV radiation and ozone. More about CR rubber.
   
   
4. Nitrile rubber (NBR) - as we mentioned, it is a synthetic rubber that is resistant to oils, greases and many other liquids. It is widely used in the automotive, hydraulic and chemical industries. More about NBR rubber.
   
   
5. Silicone rubber (VMQ) - it is a synthetic rubber that is characterized by good resistance to high and low temperatures and weather conditions. It is widely used in the food, medical and electronics industries.
   
   
6. Fluorocarbon rubber (FKM) - it is a synthetic rubber that is characterized by excellent resistance to high temperatures and aggressive chemicals. It is widely used in the chemical, petroleum and automotive industries.
   
   
7. EPDM rubber (ethylene propylene diene monomer) - is a synthetic rubber with high resistance to weather conditions, ozone, UV radiation and high temperature. It is used in the automotive, construction and electrical industries. More about EPDM rubber.

In addition to the above types of rubber, there are many other types of rubber, such as epoxy rubber, butyl rubber, and many others.