Tri-Sodium Phosphate, or TSP, is a cleaning compound typically used to prepare surfaces, such as concrete decks and swimming pools, for painting. White powder. Trisodium Phosphate 50 lb. bag.
I use Savogran REAL TSP. It works well. I once had to do mold removal from water damaged wall studs and a TSP/bleach solution not only killed all the mold/mildew, the 2x4’s looked practically brand new. One word of caution - do not spill it on any painted or aluminum surfaces … it will destroy both in very short order.
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