Special ester plasticizer for use in polar synthetic rubbers such as NBR, NBR/PVC, HNBR, CR, ACM, ECO and similar. Mediaplast NB-4 shows very low volatility at high temperatures, but at the same time has a low pour point and is therefore ideal for the production of heat-resistant vulcanizates, which should still be flexible at low temperatures. Also availible in powder form as 70 % active dry liquid on silica carrier: Mediaplast NB-4/P