vermiculite fire board in fireplace 1material:vermiculite 2 working temp:1100 3 ... strength Good insulation capacity providing better combustion and cleaner waste gas. Fire protection.No ceramic fibres, non-dusting surfaces , non-irritant, odourless ... . The vermiculite board is widely used in the first grade fire door, fireproof ceiling, fireproof wall, fireproof roller shutters, fireproof floor ...