- Creates air-tight seals on duct seams and joints
- Meets or exceeds most energy codes
- Fiber reinforced, water based, low odor
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Frequently Bought Together
Product Overview
- Fiber-Reinforced
- Weather Resistant
- Non-Flammable
- Low Odor
- Earns LEED Credits
- UL Listed
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Specifications
Dimensions
Details
Warranty / Certifications
Questions & Answers
I'm looking for new empty containers that I can reuse. Preferably metal,I have two part epoxy pai...
Asked by Jimmy December 31, 2020Home Depot sells new, empty, metal paint cans in various sizes.
Can I brush this on? Will it crack and fall off after time? Can I use it outside?
Asked by Al December 5, 2020The sealant is fiber reinforced and easy to apply by brush, to flex duct, duct board, and sheet metal air ducts. It dries to a tough, flexible, and weather resistant seal. If you have any other inquiries about our Master Flow products please call Technical Services at 800-211-9612.
I have roof duct which is painted with "Master Flow Water Based Mastic". Can I put over it water-...
Asked by Dmitriy July 18, 2020It would be best to contact Master Flow for their recommendation. They would know what materials are acceptable to put on top of their product.
can this withstand heat up to 185℉?
Asked by chris March 27, 2020The service temperature limits are from 0°f to 180°f. If you have any other inquiries about our Master Flow products please call Technical Services at 800-211-9612.
Can this be used on gutters to seal where the seals meet?
Asked by Dan November 11, 2019I would not. There is specific gutter sealant sold to seal gutters.
Is this duct mastic UL 181 compliant (labeled and listed, or marked) as required for duct sealant...
Asked by Bill September 29, 2019Yes
I have a fiberglass duct board inside my air return but it was a bad install and lots of exposed ...
Asked by MM August 14, 2019If the gaps are over a 1/4 inch I would use a good foam sealer instead. The exposed fiberglass you can paint with master flow.
Can this withstand heat?
Asked by Bubbles May 3, 2019This product is rated to 180°f. If you have any other inquiries about our Master Flow products please call Technical Services at 800-211-9612.
hire long does it have to dry before turn on unit to check for leaks
Asked by king1983 March 4, 2019Full drying time is 20 hours. Please call Technical Care at 800-211-9612 if additional information is needed.
What temperatures can this withhold?
Asked by Robo July 18, 2018Yes, this can be used. Should you have any further questions, please do not hesitate to contact Master Flow Technical Support at 1-800-211-9612.
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