General: Diazolidinyl urea (DU) is an anti-microbial preservative effective against a broad spectrum of bacteria and most fungi. We purchase a pre-mixed preservative that combines DU with a fractional amount of Iodopropynyl butylcarbamate, a stronger water-based anti-fungal agent.

Benefits: We use this preserative blend at a concentration of .05%, enough for up to three years of mold- and bacteria-free shelf life, a low enough concentration to avoid risks related with these powerful chemical preseratives.


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