Find great deals on eBay for sbr rubber sheet. Shop with confidence. Skip to main content. eBay Logo: ... SBR (Styrene Butadiene Rubber) Sheet, 70 Shore A, Black, Smooth Finish, No Backi See more like this. Buna Rubber Sheet, SBR, Black, 1/4" x 12" Width x 24" Length, 75A, 700 PSI.