Silica cord is a special fiberglass ropes which contains more than 96% silicon dioxide, loss on Ignition < 10%. With excellent heat resistance, it can work at the temperatures of 1000 centigrade degrees for about an hour and withstand at the temperatures of 1800 centigrade degrees for short-time .

Amorphous Silica Rope is used for high temperature packing, seals, cores for tadpole tapes, and seals for casting molds. To improve handling properties during installation, Silica rope has a coating which will decompose at elevated temperature. There are two rope constructions available - Round Silica packing ; Square Silica rope.