Astrologers maintain that an astrological age is a product of the earth's slow precessional rotation and lasts for 2,160 years, on average (26,000-year period of precession / 12 zodiac signs = 2,160 years). There are various methods of calculating the length of an astrological age.
It is necessary to kill the mold spores before applying Kilz to the affected area. Diluted chlorine bleach can effectively kill mold spores. After the mold has been treated with bleach, Kilz can be applied to help prevent future mold infestations and to cover stains left by mold. The process of killing and covering mold may require several days.
This is for a rental. On my home I live in, I have seen the untreated Yellow Pine (fascia) fail in <8 years even though it was primed both sides with Kilz. 19 years ago I had treated pine 1x4 trim installed and painted and still is good. Oil base primer will be used regardless.