Precipitated Silica(silicon doxide,sole making) Una.180 For sole making this type, can be packed in PP/PE ... EVA bag,paper bag Precipitated Silica ( Silicon Doxide ,Sole Making ) Una.180 Una.180 is strongest rubber reinforcing agent, ... , reduces heat capacity of tyre face glueand enhances brake system.Packing: PP/woven bag, EVA/woven bag, kraft ... 0.5 Precipitated silicon dioxide(carbon white,sole making)