$1282
- Creates air-tight seals on duct seams and joints
- Meets or exceeds most energy codes
- Fiber reinforced, water based, low odor
- See More Details
Product Overview
Master Flow Water Based Air Duct Sealant helps seal all types of air ducts to reduce the risk of conditioned air leakage. Sealing air duct plenums, takeoffs, elbows, and vent boots where they connect and sealing the seams, per product instructions, may help save energy. The sealant is fiber reinforced and easy to apply by brush, gloved hand, or putty knife to flex duct, duct board, and sheet metal air ducts. It dries to a tough, flexible, and weather resistant seal. It adheres to many surfaces like: drywall, foam and fiberglass insulation, galvanized steel, aluminum, masonry, and wood. This product is also available in 10.5 oz caulk tubes.
- Fiber-Reinforced
- Weather Resistant
- Non-Flammable
- Low Odor
- Earns LEED Credits
- UL Listed
Info & Guides
Compare Similar HVAC Cleaners & Sealers
 |  |  | |
| Brand | Master Flow | Master Flow | Speedi-Products |
| Name | Water Based Mastic Half Gallon Tub | 3 in. x 150 ft. Fiberglass Weave | 1/2 Gal. Water Base Duct Mastic Sealant |
| Price | $1282 | $1376 | $2012 |
| Ratings | (71) | (18) | (39) |
| View Product | View Product | View Product |
Specifications
Dimensions
Product Depth (in.)
6
Product Height (in.)
5.25
Product Size (oz.)
64.2
Product Width (in.)
6
Details
Color
Cream
Full cure (hours)
20
Minimum Temperature (F)
38
Pack Size
1
Product Weight (lb.)
5.7
Returnable
90-Day
Warranty / Certifications
Manufacturer Warranty
Free from Manufacturer Defect at Time of Delivery.
Questions & Answers
Typical questions asked about products:
- Is the product durable?
- Is the product easy to use?
- What are the dimensions of the product?
Customer Reviews
Jan 14, 2014
Best at what it does!
For nearly a hundred year old home with some pretty old duct work, we were heating and cooling our basement as opposed to the rest of the home. Duct tapes didn't hold up well and new air leaks would form sooner than expected. The mastic did a great job at durably holding up and sealing. Since it was an unfinished basement space, we weren't so concerned with the, shall we say, less than aesthetically pleasing final look.
by trd2d
May 20, 2021
Doesn't Compare To Good Mastic
Very watery, bought it because the HVAC store was closed. Doesn't even compare to grade quality mastic. If you want to do the jod once, the right way, don't buy this product.
by c754
Nov 13, 2020
Rating provided by a verified purchaser...
Rating provided by a verified purchaser
by JOHN
Oct 23, 2020
Went on easily ,dried hard....
Went on easily ,dried hard.
by MARK
Oct 7, 2020
My air duct was leaking, I patched the leak and applied the sealant. I then let the area dry for ...
My air duct was leaking, I patched the leak and applied the sealant. I then let the area dry for about 1 hour before turning on my AC. It has been about 3 weeks and the patch is holding.
by br
Sep 1, 2020
Works great at sealing small cracks/joints in ducts, easy to apply with a regular paint brush. Me...
Works great at sealing small cracks/joints in ducts, easy to apply with a regular paint brush. Meets expectations.
by Steve
Aug 19, 2020
Rating provided by a verified purchaser...
Rating provided by a verified purchaser
by HomeDepotCustomer
Mar 27, 2020
Good stuff...
Good stuff
by HomeDepotCustomer
Mar 11, 2020
Rating provided by a verified purchaser...
Rating provided by a verified purchaser
by NoDeal
Feb 25, 2020
Nice.
Nice.
by Will
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