Zonolite Masonry Fill 4Cf (13 Blocks)

$21.61 / BAG
Zonolite Masonry Fill is a free-flowing, drainable vermiculite insulation specially treated for water repellency and used to insulate masonry wall cores and cavities. It also increases the fire resistance rating and Sound Transmission Classification (STC) of the wall system. It is lightweight, non-toxic, and non-flammable.