Styrofoam™ extruded polystyrene pipe insulation. The rigid, closed-cell structure of Styrofoam pipe insulation gives it high compressive strength,
low friability, and excellent resistance to water and water absorption from freeze-thaw cycling. This allows it to maintain its superior performance
over long periods of time. Styrofoam pipe insulation is nondusting and nonirritating, and is not a known nutrient source for mold and mildew

Iso is a closed-cell, high-performance insulation. polyisocyanurate pipe insulation features one of the lowest ambient k-factors among all pipe
insulations and can be used over a broad temperature range from

Pittsburgh Corning's FOAMGLAS® pipe and block insulation is a lightweight, rigid insulating material composed of millions of completely
sealed glass cells. Each cell is an insulating entity. Foamglas pipe insulation's all-glass, closed-cell structure provides an unmatched combination of physical properties, it is impermiable to moisture in any form, corrosion resistant and cannot burn.