If you’ve read this blog for any length of time, you’ll know that my preservative of choice is liquid Germall Plus. It contains propylene glycol (60%), diazolidinyl urea (39.6%), and iodopropynyl butylcarbamate (0.6%). It’s a broad spectrum liquid preservative that should be used at 0.1% to 0.5% in the cool down phase of your products….
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