"EPDM" sheet rubber is a versatile blended sheet composed of Ethylene Propylene Diene Monomer and Styrene Butadiene Rubber. It achieves an ideal balance to create an all-purpose, weather resistant rubber. For this reason, EPDM material is an excellent medium for outdoor uses. Furthermore, other benefits include great pliability and elasticity. It is easy to see that EPDM rubber is the premier outdoor rubber. The special properties of EPDM sheet rubber allow it to withstand chemicals in addition to weather-related hazards such as UV rays and ozone. As a weather resistant rubber, this EPDM sheet rubber is commonly used in industrial applications and machinery that are exposed to the elements. Damage from rainstorms, pollution, and the sun will occur at a slower rate compared to a fully exposed EPDM rubber when compared to other elastomers like SBR, Nitrile or Neoprene. EPDM rubber has adequate elastic and pliable qualities. The material has a durometer of Shore 55-65A but on average, has a Shore 60A measurement. A Shore A scale measures the hardness of the rubber. For example, a soft pencil eraser has a durometer of Shore 20A. Although higher than an eraser, the durometer of EPDM still maintains a good amount of flexibility for all of your necessary projects. In addition, EPDM rubber has a minimum elongation of 300%.