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JOHNS MANVILLE INTL

Duct Insulation, 1-1/2In x 48In x 25Ft

  • Based on 133 reviews
Condition: New
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Returnable until Jan 31, 2026

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Availability: In Stock.
Fulfilled by AESECOM
Arrives Sunday, Feb 8
Order within 14 hours and 28 minutes
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Features

  • Price For: Each Material of Construction: Fiberglass Standards: ASTM C-411, ASTM C-1104, ASTM C665, ASTM C-1338, ASTM E-84, UL723, NFPA 90A, CAN/ULC S102-1188, ASTM C1290, ASTM C553, ASTM C1136s Item: Duct Insulation Thickness: 1-1/2" Color: Silver Jacket Material: Foil Scrim Kraft Type: Wrap Width: 48" Temp. Range: -32 to 250 F Density: 3/4 lbs. Approx. R Value: 4.2
  • Length: 25' Country of Origin (subject to change): United States

Description

' Duct Insulation, Wrap, Fiberglass Material of Construction, Foil Scrim Kraft Jacket Material, Color Silver, Thickness 1-1/2 In., Approx. R Factor 4.2, 3/4 lbs. Density, 48 In. Width, 25Ft Length, Temp. Range -32 to 250 F, Standards ASTM C-411, ASTM C-1104, ASTM C665, ASTM C-1338, ASTM E-84, UL723, NFPA 90A, CAN/ULC S102-1188, ASTM C1290, ASTM C553, ASTM C1136s '

Material: Fiberglass


Brand: JOHNS MANVILLE INTL


Item Thickness: 1.5 Inches


Recommended Uses For Product: Thermal Insulation


Product Dimensions: 300"L x 48"W


Manufacturer: ‎JOHNS MANVILLE


UPC: ‎696333272926 696334303353


Item Weight: ‎0.01 ounces


Product Dimensions: ‎16 x 15.2 x 48.7 inches


Is Discontinued By Manufacturer: ‎No


Material Type: ‎Fiberglass


Manufacturer Part Number: ‎670378


Date First Available: March 20, 2013


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Sunday, Feb 8

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

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Top Amazon Reviews

    • Excellent quality insulation for HVAC project
I needed to air seal and re-insulate my hvac plenum in my attic. I initially bought a roll of FrostKing insulation from Lowe’s, but it was garbage, really weak stuff. However, this stuff is professional grade insulation. The silver backing is tough and reinforced with fiberglass strings, and both foil and cloth tapes adhere to it very well. ... show more
Reviewed in the United States on September 11, 2024 by Eric_Particular
    • Used to Re-insulate 15ft of 9" diameter air duct in attic space. Successful
Seemed like great deal. Used to repair duct work. Came in large box, Wide roll. 3M venture tape went over it and stuck to it well. Easy to cut with fresh razor blade. I would buy this again if the seller can't maintain this competitive price. Otherwise I will have to return to buying it local. Convenient to have Amazon deliver it at this competitive price. ... show more
Reviewed in the United States on October 31, 2025 by Apostle007
    • Good stuff no complaints
Was not sure what I got till I opened the box and rolled out the insulation. It worked as advertised, I cut it to the proper sizes needed and started wrapping all my duct work under my house. Cuts easy enough with a blade backing does not tear as easy as other brands I have used I ordered two more rolls ... show more
Reviewed in the United States on March 4, 2017 by Scott
    • Good Buy
Product came well packaged with no damage. I used it to wrap the exposed ductwork branches from main trunk. The heat discharge temp at the registers has increased by about ten degrees. It is very easy to measure and cut and tape. Wear safety glasses and dust mask if working overhead especially as there is some fiber that that gets loosened when you work with it. ... show more
Reviewed in the United States on November 19, 2025 by diptych
    • Good quality.
Good quality foil faced insulation. Wrapped my A/C ducts with it. When calculating how much to cut, I started by allowing for 1-1/2" thickness on top of duct radius (so diameter plus 3"). This was too much and left a sag underneath the duct. Then recalculated assuming 1.25" thickness and trimmed that much off. This produced a nice fit but not so tight so as to compress the insulation. So take your duct diameter, add 2.5" (2 x 1.25"), and multiply by Pi (3.14); cut that much off the roll. Keep the 48" width and orient that in the duct direction. They put about 1.5" of extra foil along one edge to allow it to overlap the next 48" section. Tape the seems with duct tape and you're done. No more heat loss in winter and no more dripping condensation when the A/C is on. ... show more
Reviewed in the United States on September 9, 2018 by Scotty
    • Doubled up my duct insulation
Doubled up my insulation on my dockwork since it in the attic. Keeps the air cooler when ac turns on
Reviewed in the United States on August 3, 2025 by robert purdy
    • Very happy with the duct insulation
Exactly what I wanted, exactly as described. Able to wrap about 20 feet of 6 inch heating duct in a crawl space, used aluminum tape to seal the insulation, and it is making a Big difference in the warmth in the two bedrooms. Very happy with the duct insulation. I cut approximately 25 inch pieces to wrap around 48 inches at a time, used a couple of short pieces of aluminum tape to hold in place, and then taped the whole seam. Used 6 inch strips to wrap around one “tee” and several elbows, plus the funnels at the floor outlets. Took several hours but is well worth the time. ... show more
Reviewed in the United States on November 27, 2014 by Keith J. Sindelar
    • insulation
Product is exactly as ordered. arrived in great condition and on schedule.
Reviewed in the United States on October 19, 2025 by Craig

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