Professional register-sealing tape for duct leakage testing. 8" wide, 200' long, and perforated every 4" — with the stickiness and removability you know, love and need. Made for the Job Vent Seal Pro™ Professional is made specifically for temporarily sealing supply registers during duct...

Introducing Duct Mask: Precise Testing Designed as an adhesive-backed plastic film, DuctMask™ effectively seals registers, so you can focus on obtaining accurate results. It's the perfect companion for measuring duct leakage with a Duct Blaster® or Minneapolis Blower Door™. Ideal for Duct Cleaners Too...