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Old 09-22-2011, 06:32 PM   #1
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Fabric tape for duct insulation


Do you know the name of this hvac insulation fabric tape?


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Old 09-22-2011, 07:24 PM   #2
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Fabric tape for duct insulation


jjboy, that looks like Hardcast brand 2 part sealing system.

It uses a fabric tape and mastic. You pull the tape through a trough with rollers which applies the thin mastic. The applicator looks kind of like a drywall finisher's tape trough and the mastic comes in 1 gallon jugs or 5 gallon pails.

I provided a link to Hardcast's website in your other thread on this matter.

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Old 09-22-2011, 08:34 PM   #3
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Fabric tape for duct insulation


I have known stuff similar to this as "aero-ball" if I spelled that correctly when I was dong commercial A/C and sheet metal.

It is a water based glue with a canvas mesh.

It was a mesh alright.

Andy.
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Old 09-22-2011, 09:31 PM   #4
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Fabric tape for duct insulation


Quote:
Originally Posted by fabrk8r View Post
jjboy, that looks like Hardcast brand 2 part sealing system.

It uses a fabric tape and mastic. You pull the tape through a trough with rollers which applies the thin mastic. The applicator looks kind of like a drywall finisher's tape trough and the mastic comes in 1 gallon jugs or 5 gallon pails.

I provided a link to Hardcast's website in your other thread on this matter.
I checked the link but I couldn't find anything similar. I'll check again. Thanks
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Old 09-22-2011, 09:33 PM   #5
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Fabric tape for duct insulation


Quote:
Originally Posted by AndyGump View Post
I have known stuff similar to this as "aero-ball" if I spelled that correctly when I was dong commercial A/C and sheet metal.

It is a water based glue with a canvas mesh.

It was a mesh alright.

Andy.
I don't think is a mesh tape... doesn't look like.....also the final job looks clean for any mastic applied on top of the tape
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Old 09-22-2011, 11:44 PM   #6
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Fabric tape for duct insulation


Hey Andy, Do you think this is the right canvas?

http://www.grainger.com/Grainger/OWE...5&cm_vc=HPPVZ3
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Old 09-23-2011, 12:41 AM   #7
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Fabric tape for duct insulation


No that is not it. The stuff I used was a cloth mesh not fiberglass now that I remember.

Andy.
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Old 09-24-2011, 10:00 AM   #8
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Fabric tape for duct insulation


Here are some pics of what we used to use for sealing the joints and seams of underground duct systems.

The tape...


Closeup of the tape...


The dispensing system...



Now, having said all this I'm going to ask why you think you need this type of tape and mastic for duct that isn't exposed to the moisture intrusion and external pressure problems that underground duct is exposed to.

We don't even use this stuff anymore for underground systems because there are better and less expensive sealants that are easier to apply and less messy, such as Pro-Seal.

I would also like to add that the only time we ever even used the 2-part Hardcast system was on PVS coated metal, which is designed for underground duct.
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Old 09-25-2011, 12:57 AM   #9
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Fabric tape for duct insulation


+1

Why not just caulk or mastic the seams for re-sealing.

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