Microlite® Black PSK Formaldehyde-free™ duct wrap offers excellent thermal control with the added benefit of a black-coated PSK facing that is ideal for aesthetic applications. It is recommended for exposed applications inside the building envelope, such as open ceilings with exposed duct work. Our manufacturing process ensures insulation consistency during production, which results in reliable product quality. Microlite Black PSK meets the UL requirements for 25/50 flame spread/smoke developed. Matching Black PSK seaming tape is available.