I am interested in making some sweeping compound .I plan on mixing very ,very ,little demethed glycerin with fine sawdust. Does any one have thoughts on the safety of storing such a product?If it were being used in a facility that sweeps up tons of sawdust in gerneral,would there be risks with disposal?.This is a gift idea for the factory that donates space to me.They recycle pallets.I don't want my "gift" to burn the place down!

Spontaneous combustion would always be my fear.