Nullifire B270 Fire Stop Compound is a single-part gypsum based compound providing up to 4 hours fire resistance. It is designed to re-instate the fire resistance of the compartment wall or floor, whilst providing an unsupported load-bearing capacity up to 2.5kN/m2 (UDL), up to a 1800mm span, in accordance with BS 6399-1:1996 minimum requirements. This system also provides thermal, acoustic and air sealing performance.
See data sheet for Nullifire B270 Load Bearing Fire Stop Compound – PDF