Halo Exterra® is designed to insulate exterior above-grade walls in residential, commercial, and industrial buildings, resulting in energy efficient building enclosures. Halo® Exterra® can also function as the water resistant barrier for the building enclosure (thicknesses of 9/16 in. (14mm) or greater) when the joints of the product are sealed with tape or a liquid applied membrane.

Halo® Exterra® products are rigid foam sheathing insulation boards made from graphite infused polystyrene (GPS), which offers up to 18% more thermal resistance than conventional expanded polystyrene insulation (EPS). Halo® Exterra® is coated with perforated polypropylene laminates on both sides of the insulation.