... gasket, petroleum pipeline, insulator, tablet powde fumed silica LM-200 White carbon black 1. Characteristic: It is a white and ... -particle from 5-40 nm and has obvious properties such as thixotropy, reinforcing, thickening and filling etc. and is insoluble ... in ambient temperature (low water content), silicone neutral rubber.A-200: used widely in sealing ring, sealing gasket, petroleum pipeline, ...