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.
The mold remediation industry no longer uses it and strongly advises against it. Here's one site (I just googled, do not know these people): http://www.countyservicesinc.com/bleach-myth.php. Sheet rock is one of mold's favorite foods and is quite porous-so if there is mold in a piece, it should be replaced. Kilz might contain it on other surfaces, but it will grow inside sheetrock and can spread to an area that isn't Kilz'ed, so I'd say no in this instance.