50 mic. An aluminum tape with no liner. Aluminum support ensures the perfect reflection of both the heat and light. A high quality adhesive offering strong adhesion and holding power; offers sealing and adhesion for HVAC channel applications, Folio-Scrim-Kraft covering joints and stitches. Offers a good level of ageing resistance in indoor locations. Delivers a low level of moisture water transmission rate, and a perfect level of sealing and patching performance.