IamCheap wrote:
And, it’s best to sand the surface first, before treating them with the bleach water, if at all possible.
You should Never Sand Anything containing Mold without Proper Ventilation Equipment.
Once a surface has been properly washed, it should be allowed to dry, (less than 18% moisture content) before further treatment.
Then, once it is Dry, you should apply a fungicidal sealant.