Model # INSLV6

Internet #100396953

Store SKU #363913

Store SO SKU #1000684925

null 6 in. Dia R-6 Ductwork Insulation Sleeve
0050206023327

6 in. Dia R-6 Ductwork Insulation Sleeve

  • R-6 insulation
  • Reduces condensation, absorbs noise and improves air temperature
  • For use on new and existing ductwork
$645 /each
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Product Overview

Insulate your new or existing 6 in. duct pipe with this Master Flow 6 in. Dia Fiberglass Insulation Ductwork Sleeve. Enjoy consistent air temperature and reduced system condensation and noise. On new pipe installation - simply slide the sleeve over the 6 in. duct pipe as it is being installed. For existing duct pipe up to 6 in. in diameter - cut the jacket length wise (insulation is pre-cut) and wrap around the pipe.

  • Insulates new or existing ductwork to help maintain consistent air temperature in a ventilation system
  • Insulates pipes up to 6 in. in diameter and up to 5 ft. in length
  • R-6 value for effective insulation of your duct system
  • Reduces mold-causing condensation and absorbs draft and duct system noise

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Customer Questions & Answers

If you can buy 25ft of insulated flexible ducting for $26....why wouldn't a person just buy that ...

If you can buy 25ft of insulated flexible ducting for $26....why wouldn't a person just buy that and remove the inner flex duct and use the insulating sleeve it comes with? I mean seriously...5 feet for 20 bucks?! Maybe I'm missing something?
Asked by: Steve
Not sure where you're getting your pricing from, this was $6.45. Anything more than 6 feet was unnecessary and would have been trashed.
Answered by: Fixitman
Date published: 2017-06-20

Can you install this after install?

Can this go on after ducts are installed or must they go on before making the connections? In otherwords, must they slide onto the ducts or can they be wrapped?
Asked by: Smitty
You can install these after the ductwork is installed. It takes a little longer, but is designed with this in mind. The insulation has a natural seam - using sharp contractor shears you can cut the sleeve lengthwise along this seam. Then place the insulation over the duct and the sleeve over the insulation. You may wrap 1/2"-1" of the insulation over itself to minimize the air gap without compressing the fiberglass. I try to offset the seam in the insulation with the cut in the sleeve. Once the sleeve is generally in place use foil tape to secure both ends and the middle, then use long sections to seal the remainder of the seam.
Answered by: wbdarby
Date published: 2017-01-08

Where is the 4in. Diameter duct sleeve?

I want the 4 inch sleeve for my 4 inch ductwork from the bathroom fan into my attic (the Maine winter is causing condensation to drip back into the house). I can't find it at anywhere.
Asked by: Hc
It seems that you could use the 6" sleeve if you cut the sleeve down the seam, wrap the insulation over itself (without compressing it) and overlap the sleeve before taping it. It will take a bit longer, but should be doable. I used 6" sleeves on existing ductwork, and slightly wrapped the insulation over itself to reduce the air gap between the insulation and duct.
Answered by: wbdarby
Date published: 2016-09-14

Is this product waterproof, as in if a bathtub overflows and water leaks through the floor down i...

Is this product waterproof, as in if a bathtub overflows and water leaks through the floor down into the basement and on to the ductwork, does the product need to be replaced?
Asked by: Lynn
No, it would not seem to be waterproof.
Answered by: Fixitman
Date published: 2017-06-20
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Customer Reviews

6 in. Dia R-6 Ductwork Insulation Sleeve is rated 3.5 out of 5 by 26.
Rated 3 out of 5 by from It's a good enough product in theory, but not in practice. The issue is that it is a sleeve, des... It's a good enough product in theory, but not in practice. The issue is that it is a sleeve, designed to slip over duct pipes. It works best if you are installing new ducts, or if you disconnect duct work to slide over the pipes. The suggested method for older pipes in use is to cut it lengthwise, wrap, then tape in place. This was the method I used for my old duct pipe that need insulating. What I didn't like is that the metallic layer is not connected to the fiberglass layer. Once you cut it, it wants to slide off because it's slick. So you are better off just buying a roll of normal normal insullation with an attached paper backing to wrap in a spiral pattern, or cut in short pieces and wrap/tape in place.
Date published: 2017-07-05
Rated 5 out of 5 by from Worked Excellent I wrapped the sleeve on the duct. I first taped all the seams, then did the wrap. I first did the two rooms furthest from the unit. Before the wrap, not so good. After the wrap, the air was coming out of the vents strong and cold. Product worked great.
Date published: 2017-06-27
Rated 5 out of 5 by from The ducting for our portable AC unit fit finto duct... The ducting for our portable AC unit fit finto duct sleeve and has allowed for the room to cool down much quicker as it stops the hot air from coming into the room due to the insulation.
Date published: 2017-04-18
Rated 5 out of 5 by from Used this to sleeve the exhaust on a portable air conditioner used on our sailboat. Did a great j... Used this to sleeve the exhaust on a portable air conditioner used on our sailboat. Did a great job of cutting down the heat from the plastic exhaust duct and made the unit much more efficient.
Date published: 2017-06-20
Rated 5 out of 5 by from Well made and as intended... Well made and as intended
Date published: 2017-07-04
Rated 4 out of 5 by from This is a great product I used 15 rolls of this duct insulation - the 6 and 8 inch - to repair existing ductwork in a very confined crawl space in my 40 YO house. That meant the insulation wrap had to be cut. Here, it is important to have very sharp scissors to prevent snagging and tearing. Other than that, it was very easy even in the limited work space. After cutting the wrap lengthwise, the insulation was laid over the duct, then the wrap was laid over and pulled onto place. Using flexduct tape, put 3 strips - one at each end and one in the middle to make a temporary hold Then ran tape the length of the seam. Simple as that. Installation on new ducts would be even easier since no cutting would be required. The insulation quality is very good and the outer wrap is strong yet very flexible. I highly recommend this for anyone to use and the price was very reasonable. This was my first try at doing the ducts and, for just a diy-er, it went very well.
Date published: 2009-05-06
Rated 2 out of 5 by from Much Needed, BUT They Will Short You! Master Flow is not consistent with product, they are using two different fiberglass mats, a thicker firmer yellow mat and a thinner less firm pink mat insulation! Secondly, the outer aluminumized shell is consistently shorter then the fiberglass mat, which is stupid because you want to overlap outer shell to tape ends together! Thirdly, as the description states "up to five feet" because it is not five feet, they short you up to a half a foot! If you wanted to put up three units, end to end, to reach 15 feet, you will never get there, and need to buy a forth unit!
Date published: 2014-12-08
Rated 2 out of 5 by from Best for new or disassembled venting I agree with the previous comments regarding trying to cut and tape this over existing ducting. It probably works pretty well if you can just slide it over a piece of duct before assembly. For retrofit work, I'd suggest buying foil backed batting and cutting to size instead.
Date published: 2013-05-26
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