... :Using reflective, tinted, patterned, or low-e glass, IGU’s are produced by adhering an aluminum frame ... between two panes of glass using two layers of sealant (butyl rubber ... . Specifications: Available glass types for IGU:Low-E, tinted, reflective, tempered, curved tempered, laminated, curved laminated, patterned, Low-IronMax ... Fill: Dry Air, Argon Double Glazed Window Glass