1970 Deville A/C evaporator outlet pipe

[colorado4x4]

1970 Deville convertible:
On the outlet pipe from the air conditioning evaporator to the suction throttling valve there is a black tarlike insulation substance that covers a section of the outlet pipe and the power element bulb/capillary tube that comes from the expansion valve.

What is this the proper name for this insulation substance, and where might I find it new?


I am in the beginning stages of resurrecting the a/c (keeping it R12) on both of my Deville convertibles, just did a nitrogen  pressure test on one of them, and found an initial leak at the o-ring on the oil bleed line that attaches to the suction throttling valve.....ordered an o-ring kit....once I fix that leak will continue the nitrogen pressure test to find other leaks.

[Big Fins]

Not sure of the exact name of it, but it can be found in HVAC supply outlets and appliance parts stores. It usually is sold as a roll in a box with a tacky side that is protected by a paper covering.

We did have a technical name for it back in the day. We simply called it 'dum-dum'.

["Cadillac Kid" Greg Surfas 15364]

Called "press tight"
Greg surfas

[dn010]

I ordered "A/C Insulation Tape" from Amazon and have used it on multiple vehicles without issue.


This will be way more than you'll ever need for one car, but at least it is an option:
https://www.amazon.com/FJC-2862-Insulation-Tape-Roll/dp/B0049MM5BM

[Big Fins]

I ordered "A/C Insulation Tape" from Amazon and have used it on multiple vehicles without issue.


This will be way more than you'll ever need for one car, but at least it is an option:
https://www.amazon.com/FJC-2862-Insulation-Tape-Roll/dp/B0049MM5BM

That's the stuff! I found many uses for it other than just auto A/C.

["Cadillac Kid" Greg Surfas 15364]

The original is a mix of fiber and an Asphalt mix
Greg surfas

[colorado4x4]

Thank you everyone for the responses that got me going, as I had no idea what to call it.
The insulation seems to go by a lot of names:

-Tape, Insulation, AC Expansion Valve
-Tacky Tape, Insulation for Expansion Valve
-AC Expansion Valve Bulb Sealer Insulator
-Press Sealing Tape

Here are some screenshot examples from various vendors: