the invention relates to a silicate compound having at least one alkaline oxide and silicon dioxide - containing amorphous binder matrix and also containing oxides from the aluminum , calcium , titanium , magnesium , zirconium , and / or boric oxide group . to provide a silicate compound which is suitable for both making a moulding and coating a substrate , resistant to effects like weathering , especially through alternate frost and thaw , and attack by acids , lyes or fouling , it is proposed that the amorphous binder matrix contain 4 to 25 mol silicon dioxide per mol alkaline oxide , the alkaline oxide being lithium , sodium , and / or potassium oxide and the amorphous binder matrix also contains up to 80 mol aluminum oxide and / or up to 45 mol calcium , titanium , magnesium , zirconium , and / or boric oxide evenly distributed per 100 mol silicon dioxide .