FIRE RETARDANT COATING

摘要

A solution for forming a fire resistant coating on substrates such as timber comprises an aqueous solution of an alkali metal silicate containing from about 5 to about 70 % by weight of the alkali metal silicate and having dispersed therein a filler in an amount of from about 5 to about 60 %. The filler is preferably an intumescent material such as a graphite capable of exfoliation. The solution may be applied by brushing or spraying onto timber in a mine to form coatings from 1 to 4mm in thickness.