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Internet # 100396973

Model # WBA50

Store SO SKU # 1000683931

Water Based Mastic Half Gallon Tub

  • Creates air-tight seals on duct seams and joints
  • Meets or exceeds most energy codes
  • Fiber reinforced, water based, low odor
  • View More Details
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Free & Easy Returns In Store or Online
Return this item within 90 days of purchase. Read Return Policy
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Product Details
  • Creates air-tight seals on duct seams and joints
  • Meets or exceeds most energy codes
  • Fiber reinforced, water based, low odor
About This Product

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
  • Return Policy
Product ID #: 100396973Internet #: 050206992005Model #: WBA50
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Specifications

Dimensions: H 5.25 in, W 6 in, D 6 in

Dimensions

Product Depth (in.)6 inProduct Height (in.)5.25 in
Product Size (oz.)64.2Product Width (in.)6 in

Details

ColorCreamFull cure (hours)20
Minimum Temperature (F)38 FPack Size1
Product Weight (lb.)5.7 lbReturnable90-Day

Warranty / Certifications

Manufacturer WarrantyFree from Manufacturer Defect at Time of Delivery.
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Questions & Answers

27Questions
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Q:The post on my patio are rotten at the base. Can this be used to seal the base? I will have metal trim encompassing plus wood trim Product would be sealed not exposed to weather
by|Sep 11, 2021
1 Answer
Answer This Question

A:  Thank you for contacting Master Flow. We would not recommend using the Water based Mastic for this application. If you have any other questions please give us a call at 1-800-211-9612.

by|Sep 27, 2021
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    Q:I'm looking for new empty containers that I can reuse. Preferably metal,I have two part epoxy paint that I need to save and reuse Gallon, Half gallon, quart
    by|Dec 31, 2020
    1 Answer
    Answer This Question

    A:  Home Depot sells new, empty, metal paint cans in various sizes.

    by|Jan 5, 2021
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    Q:Can I brush this on? Will it crack and fall off after time? Can I use it outside?
    by|Dec 5, 2020
    1 Answer
    Answer This Question

    A:  The 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.

    by|Dec 7, 2020
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      Q:I have roof duct which is painted with "Master Flow Water Based Mastic". Can I put over it water-based epoxy primer and on the top of this primer silicon coat? - I want to use as a primer "Gaco E5320 Two-Part Epoxy Primer/Filler" and as a silicon coat "Gaco GR1600-5 White GacoRoof Silicone Roof Coating".
      by|Jul 18, 2020
      1 Answer
      Answer This Question

      A:  It would be best to contact Master Flow for their recommendation. They would know what materials are acceptable to put on top of their product.

      by|Jul 28, 2020
      Showing 1-4 of 27
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      Customer Reviews

      3.9 out of 5
      • 3.9 out of 71 reviews
      • 67% recommend this product
      Filter by:
      Showing 1-10 of 71 reviews
      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
        • Recommended
        12 found this review helpful
        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
          Rating provided by a verified purchaser...
          Rating provided by a verified purchaser
          by
          • Verified Purchase
          Went on easily ,dried hard....
          Went on easily ,dried hard.
          by
          • Verified Purchase
          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
          • Verified Purchase
          • Recommended
          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
          • Verified Purchase
          • Recommended
          Rating provided by a verified purchaser...
          Rating provided by a verified purchaser
          by
          • Verified Purchase
          Good stuff...
          Good stuff
          by
          • Verified Purchase
          Rating provided by a verified purchaser...
          Rating provided by a verified purchaser
          by
          • Verified Purchase
          Nice.
          Nice.
          by
          • Verified Purchase
          • Recommended
          Showing 1-10 of 71 reviews