Will ProLong Gold Antifade Reagent with DAPI #8961 freeze at -20C and is it stable at other storage temperatures?

ProLong Gold Antifade Reagent with DAPI #8961 will not freeze solid at -20C. It does, however, become very viscous, and we recommend bringing it to room temperature before pipetting. Freeze-thaw cycles do not appear to affect the efficacy of this product. Additionally, the product is stable for up to 6 months at room temperature, so therefore it is safe to assume it is stable for the same period of time at 4C. 

Last updated: October 16, 2025