1.BR Can be mixed with NR, chloroprene rubber, nitrile ... : Supplying Natural rubber Cis-1,4 Poly butadiene rubber BR rubber,Off grade BR9000 1).Advantages:1. High flexibility and ... tape, seals, shoe soles and other rubber products. 3). BR Performance Parameter Item BR9000volatile,% ≤0.75total ash,% ≤0.3Raw rubber ... . Supplying Natural rubber Cis-1,4 Poly butadiene rubber BR rubber,Off grade BR9000