Hardcast 1402 foil grip tape or 558ca butyl tape?
hamconsulting
11 years ago
This stuff hardcast 1402 tape is not easy to find. Only one for sale at eBay for over $40 with shipping. Read article at energy vanguard.com that butyl tape 558CA was just as good.
Since home depot has Nashua 558CA tape, I bought it to seal a few things around the house.
One of my two 12x24 air returns was open to the crawl space. I bought a half stack rectangular duct vent to cover bottom of plenum at return vent on wall by floor. I used sheet metal screws to fasten it to plenum. I then used Nashua 558CA tape over the screws to seal all areas on inside bottom of plenum.
I didn't use mastic sealant, but I did buy a 1/2 gallon tub of master flo air duct mastic sealant. I didn't use it and im going to return it. Unless someone tells me I should apply it over 558CA tape inside plenum.
hamconsultingOriginal Author
Elmer J Fudd
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Elmer J Fudd
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