http://www.aasupply.com/html/mold_remediation_what.html
We carry Sporicidin because it has some features that other biocides do not:
It is the only biocide certified by the EPA for use indoors, including inside of air ducts.
Does not stain surfaces like bleach or other biocides.
Provides a guaranteed kill and after decontaminating a surface, it leaves a residual bacteriostatic affect for up to six months.
Has a pH level of only 7.5 which means it can be painted over with most paints. Instructions for use are included. is on mold contaminated gypsum wall board and OSB (oriented strand board) that has not been seriously water damaged. Sporicidin is the product of choice because it is far more economical than wall and ceiling replacements and is much less likely to ever become recontaminated than brand new wall board or OSB. The reason is that new OSB and wall board already have the mold spores present in the materials they are made of and only require moisture to start the growth process. Building materials have a residual protection within the materials after they have been treated. The University of Maryland and Georgia State University have both proven this to be true.