Infills: Recycled Tires

The section presented here covers information on chemicals found in the most commonly used type of synthetic infill: crumb rubber made from recycled tires. The recycled tire material is often referred to as styrene butadiene rubber (SBR) as this polymer is widely used in tires; it is also sometimes referred to generically as crumb rubber. For clarity, in this document we refer to it primarily as “tire crumb.”