Register Sealing Film, 24" x 200' Roll Duct Mask is used to provide a quick temporary seal on registers and grilles when measuring duct airtightness with a Duct Blaster or Blower Door. With Duct Mask you can professionally reduce the time and hassle of sealing off the duct system. Duct Mask is an adhesive backed film. Duct Mask is perforated every 24" to provide a quick, custom, one-step installation. Duct Mask is affordable, less than $.10 for a standard 6 x 10 register, or about $2.50 per house.
Also available in 8"x 200' rolls, click here.
See item #6610