What is that black AC sealant material?

[charliec]

Someone please tell me the name of the black putty stuff that you use to seal around the air conditioning lines (typically at firewall penetrations). It usually has a fiber material in it; it doesn't harden but stays tacky. I know what I want, but I don't know the name of it to ask for it at the hardware store or auto parts store.

 

[burdar]

Strip Caulk? Butyl?

 

[dadsbee]

Butyl, stop buy the local auto glass shop and ask them for a foot or two strip off a roll.

 

[doug 371]

dum dum

 

[townsend]

Four Seasons 59010.

 

[royslead]

I've heard it called Butyl, Dum Dum, and Mastic.

 

[rbkt65]

napa has it but it is a 20-25 ft roll. i can get the part number if needed. it is in the garage.

 

[charliec]

napa has it but it is a 20-25 ft roll. i can get the part number if needed. it is in the garage.

Thanks for that. I think I can track it down now that I know what to all it.

 

[RustyRatRod]

I use 3M putty. Always called it dum dum. Even Baby Pink Nose knows what dum dum is.

 

[scatpackbee]

Eastwood has it.

And Proform

They’re both the exact same product. Eastwood must get it from Proform.

 

[rbkt65]

napa stuff.

 

[67Dart273]

We used to use a cork impregnated roll/ tape sealer in HVAC/R made FOR refer lines. I don't remember off hand the brand or name.

Here is one type

Cork Tape - VAPCO Company - Innovating HVACR for more than 65 years

 

[67Dart273]

We used to use a cork impregnated roll/ tape sealer in HVAC/R made FOR refer lines. I don't remember off hand the brand or name.

Here is one type

Cork Tape - VAPCO Company - Innovating HVACR for more than 65 years

The reason you want insulated refrigerant lines to be as water / air tight as possible is that condensation can wick into and capillary up into and under the insulation. This is especially important with freezers because it will freeze, expand, and build up

 

[charliec]

We used to use a cork impregnated roll/ tape sealer in HVAC/R made FOR refer lines. I don't remember off hand the brand or name.

Here is one type

Cork Tape - VAPCO Company - Innovating HVACR for more than 65 years

That's the stuff I remember my dad using many years ago. He was a refrigeration mechanic.