Duct Seal

[BrandonV]

For penetrations going into the air handler what is the industry standard method to seal those up? I always see this black tarish stuff on the copper lines going in.

I do electrical mostly it reminds me of duct seal but it's clearly something different.

 

[BrandonV]

Found it. Cork tape for anyone interested.

 

[PoorUB]

Cork take, or the grey gooey clay like duck seal for small holes. It depends on what you are sealing!

The black cork tape is awful stuff, but it has a place. If it is on a panel that needs to come off do not use the cork tape!