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The core of the fire door is a rigid, high density material which is used for high temperature applications. This core is made up of non asbestos Calcium Silicate insulation board. This material is light weight with low thermal conductivity, high temperature and chemical resistance. It is a white free-flowing powder derived from limestone and diatomaceous earth, calcium silicate has no known adverse effects to health. It is used in roads, insulation, bricks, roof tiles, table salt and occurs in cement High temperature calcium silicate core for fife rated door is a kind of inorganic and non-combustible material with stable! physical and chemical properties. The characteristics are high temperature resistance, low thermal conductivity, good performance of soundproof and insulation, lightweight and high special strength.

It does not deform in normal temperature or moist air. Free from asbestos, is a kind of green building material, have not any irritant smoke when burning and high temperature. High temperature calcium silicate core is used for 30min, 60min and 90min fire rate wooden fire door and metal fire door.

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