Nashua Foil mastic Tape acts as a superior closure and sealing system for use with UL listed flexible, non-metallic air ducts and air connectors. Permanent air tight seal on sheet metal ducts. Sheet metal repairs.
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Passes SMACNA 1/2 in., 1 in., 1 in., 4 in., 6 in. and 10 in. pressure classes and seal classes A, B and C (results confirmed by the SMACNA Research and Testing Institute) for use on rigid sheet metal HVAC systems.
Foil tape with mastic sealer included
Used on flexible air ducts and sheet metal systems to seal and seam