Vermiculite based poured insulation with NO asbestos
TOP Mix is a Vermiculite based poured insulation available in a 26 lb. bag. It contains NO asbestos and is simply mixed with water and poured around the chimney liner. It then solidifies to a cement like texture providing both stability and insulating value for proper clearance to combustibles.
One bag provides 2 cubic feet of insulation. The TOP Mix Sizing chart below can help you calculate how much TOP Mix you need.
Oil & Gas appliances are recommended to have insulation, but not required.
A minimum 1” clearance is needed from the exterior of the masonry structure to combustibles.
Two types of insulation are available:
TOP Mix is a Vermiculite based poured insulation and contains NO asTOP-os
TOP Wrap is 1/2" thick Foil-Faced Ceramic Wool Blanket that provides the zero clearance requirement