XLPE (Cross-linked Polyethylene) insulation is a high-performance, closed-cell polyolefin foam used for superior thermal and acoustic insulation in HVAC, piping, and construction, featuring high moisture resistance and durability. It resists fungi/bacteria, offers excellent temperature resistance (up to 90°C), and is commonly used for ducting, under-deck, and pipe insulation, available in sheets, rolls, and tubes.