Styrene-butadiene rubber. A polymer used in the manufacture of expanded rubber. It is very economical and possesses no unique chemical resistance properties. SBR rubber can be compounded to provide very fine abrasion, wear, and tensile qualities. SBR can be readily substituted for natural rubber in many applications with significant cost savings. Resilience is about the same as natural rubber. SBR rubber is a staple in the HVAC and construction industry as it is versatile, flexible and tough enough to stand up. SBR rubber is a good choice when deciding to choose a material that has great mechanical properties and flexibility