Xci Foil Class A is an energy efficient rigid insulation panel composed of a closed cell Class A polyisocyanurate foam core manufactured on-line to 15 mil reinforced foil facers on both sides. This panel comes in 4′ x 8′ panels in thickness of 1″ to 4″. This panel has been tested to meet air and water barrier requirements to provide all-in-one functionality when seams and penetrations are treated with approved materials. Polyiso Eco Ready (Optional) with 5% bio-content option available for thicknesses between 1.0″-3.0″.