Tropical humidity propylene glycol humidor solution

TROPICAL HUMIDTY by Cigar Star offers the perfect humidification solution for your humidor. This solution consists of 50 propylene glycol and 50% distilled water and should only be applied to sponge-based humidifiers.
Propylene glycol is a colourless and harmless liquid which has two favourable qualities for your humidor:
It prevents the formation of mold and bacteria
It is self adjusting to a humidity level of 70%.