All ironmongery installed on a fire door must be fitted without compromising the integrity of the complete fire door assembly. This graphite fire lock protection is a high performance sheet which prevents the heat transfer onto ironmongery rebated into timber doorsets. Features Safe to handle - contains no fibres or irritants 1mm thick graphite Unaffected by moisture, humidity, common industrial and household chemical substances 75 x 105mm Flexible Testing Tested to BS 476 Part: 22 1987 & BS EN 1634-1 2014