Powder borax for cleaning and fluxing, knife metal fusing in blacksmithing as a fluxing agent to hot weld different metals into a composite. Metal melting flux.
Ant baiting eradication with sugar.
Candle wick primer to improve candle burning. Slows down burning rate as to reduce wax pool drowning candle flame.
Leather and hide tanning often used with alum.
Keep away from children and pets.