Largest form of rubber recycling is of the tires. There are many industrial grade rubber as well which are recycled. Landfilling of tires is hugely dangerous with multiple environmental hazards, it is even banned in many countries.
Amongst the primary functions of used tires is burning them for fuel in industrial kilns of manufacturing of Cement, Paper, Steel, etc. Tires reduced down to crumb form is used for multiple industrial applications & construction of roads, etc. market making potential is huge in the Rubber Recycling industry owing to excessive fragmentation.