Use of internal gas forming compound to adjust {TAIL ~ coating porosity} to control {HEAD ~ copper release rates} in algae retardant roofing granule products 
Use of internal gas forming compound to adjust { TAIL ~ coating porosity } to control { HEAD ~ copper release rates } in algae retardant roofing granule products
OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH