... Very widely used in different industries. Vermiculite has excellent capability of heat insulation, freeze-proofing, gem-proofing, fire-proofing, ... to golden yellow or silvery white. The average bulk weight of vermiculite is 100-150kg/m3 with tiny air interlayer, ... gardens, dope, board, oil paint, rubber, refractory, softener of hard water refining, architecture, shipbuilding, chemistry and so on. ...