What is this stuff called? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

truckin 79 · 06-30-2021, 01:02 PM

It is kind of tacky but is used as insulation for the copper pipes on this evaporator. I need to find some more of this stuff to seal it back up again. I am just about ready to flush and put new hoses on this unit. Also anyone know what the probe is used for that goes into the fins? You can see in first picture the probe and then the crusty round circle that it went into. The wires are connected to a little black box,so not sure if it is just another safety switch not sure.

Just call me Sean · 06-30-2021, 01:04 PM

I think it's a type of butyl rubber.

**mongocanfly** · 06-30-2021, 01:38 PM

3m strip caulk

**kwmech** · 06-30-2021, 01:39 PM

At the parts store it is called the AC sticky tar insulating stuff---works for me when I go there

**mongocanfly** · 06-30-2021, 01:44 PM

Haha...KW, youd probably have better luck asking for it that way than if you had a part number

**kwmech** · 06-30-2021, 02:10 PM

Quote:

Originally Posted by mongocanfly

Haha...KW, youd probably have better luck asking for it that way than if you had a part number

Sometimes you do if you get an older person behind the counter that knows things instead of how to push a key on a board

Dead Parrot · 06-30-2021, 06:11 PM

If you don't have any luck at the autoparts store, might try an home AC shop. I have seen similar in some inside cold coils on residential split units.

Probe might be the anti-freeze probe. More likely if the black box is wired in series with the compressor wiring. On my 75, the probe is a metal tube.

**TKCR** · 06-30-2021, 06:26 PM

https://www.ebay.com/itm/New-Roll-of...-/141055220764

Eyegore · 06-30-2021, 06:30 PM

Is this what your looking for?

Dayco 80170 - Dayco Autoflex Defroster Duct Hoses
( 13 ) Part Number: DAC-80170
Dayco 80170 - Dayco Autoflex Defroster Duct Hoses Made in the USA
https://static.summitracing.com/glob...80170.jpg?rep=
$28.99
Dayco Autoflex Defroster Duct Hoses
Duct Hose, Black, 2.50 in. Diameter, 6 ft. Length, Each
See More Specifications | Check the Fit

In Stock (more than 10 available)

**69Tom** · 06-30-2021, 06:39 PM

I just bought this. Has flat sheets of it in the kit.

https://www.classicparts.com/1967-80...tinfo/HA-8708/

truckin 79 · 07-01-2021, 11:05 AM

Quote:

Originally Posted by 69Tom

I just bought this. Has flat sheets of it in the kit.

https://www.classicparts.com/1967-80...tinfo/HA-8708/

Hmm that looks like an interesting kit might have to get that since it cost just as much as the 3M stuff alone. I need to try and put vacuum on this evaporator to make sure it will hold pressure. Thanks everyone for pointing me in the right direction.

Eyegore I was not looking for the ducting quite yet but thanks for the source.

Dead Parrot looks like you are correct it is a sensing bulb that will cycle the compressor if the evap freezes up.

kglowacky · 07-02-2021, 02:48 PM

i buy it by the foot from my aftermarket car ac store. They sell custom ac hoses and complete aftermarket ac systems for hot rods.

06-30-2021, 01:02 PM	#1
truckin 79 Registered User Join Date: Jun 2014 Location: CO Posts: 733	What is this stuff called? It is kind of tacky but is used as insulation for the copper pipes on this evaporator. I need to find some more of this stuff to seal it back up again. I am just about ready to flush and put new hoses on this unit. Also anyone know what the probe is used for that goes into the fins? You can see in first picture the probe and then the crusty round circle that it went into. The wires are connected to a little black box,so not sure if it is just another safety switch not sure. Attached Images __________________ 79 Chevy 2wd BIG10 350 TH400 Last edited by truckin 79; 06-30-2021 at 01:12 PM.

06-30-2021, 01:38 PM	#3
mongocanfly Post Whore Join Date: May 2015 Location: Alabama Posts: 14,601	Re: What is this stuff called? 3m strip caulk __________________ Mongo...aka Greg RIP Dad RIP Jesse 1981 C30 LQ9 NV4500..http://67-72chevytrucks.com/vboard/s...d.php?t=753598 Mongos AD- LS3 TR6060...http://67-72chevytrucks.com/vboard/s...34#post8522334 Columbus..the 1957 IH 4x4...http://67-72chevytrucks.com/vboard/s...63#post8082563 2023 Chevy Z71..daily driver

06-30-2021, 01:39 PM	#4
kwmech Senior Member Join Date: Mar 2003 Location: Colfax-California Posts: 8,407	Re: What is this stuff called? At the parts store it is called the AC sticky tar insulating stuff---works for me when I go there

06-30-2021, 01:44 PM	#5
mongocanfly Post Whore Join Date: May 2015 Location: Alabama Posts: 14,601	Re: What is this stuff called? Haha...KW, youd probably have better luck asking for it that way than if you had a part number __________________ Mongo...aka Greg RIP Dad RIP Jesse 1981 C30 LQ9 NV4500..http://67-72chevytrucks.com/vboard/s...d.php?t=753598 Mongos AD- LS3 TR6060...http://67-72chevytrucks.com/vboard/s...34#post8522334 Columbus..the 1957 IH 4x4...http://67-72chevytrucks.com/vboard/s...63#post8082563 2023 Chevy Z71..daily driver

06-30-2021, 06:11 PM	#7
Dead Parrot Registered User Join Date: Aug 2012 Location: Oklahoma City, OK Posts: 2,498	Re: What is this stuff called? If you don't have any luck at the autoparts store, might try an home AC shop. I have seen similar in some inside cold coils on residential split units. Probe might be the anti-freeze probe. More likely if the black box is wired in series with the compressor wiring. On my 75, the probe is a metal tube.

06-30-2021, 06:26 PM	#8
TKCR Senior Member Join Date: Oct 2014 Location: Ohio Posts: 6,872	Re: What is this stuff called? https://www.ebay.com/itm/New-Roll-of...-/141055220764 __________________ FB Page for my Seats Belts https://www.facebook.com/73-87-Chevy...9439407476735/ Restoring Seatbelts: http://67-72chevytrucks.com/vboard/s...d.php?t=809750 SOLD My 86 Build:http://67-72chevytrucks.com/vboard/s...d.php?t=654972 Past Restored Bench Seats:http://67-72chevytrucks.com/vboard/s...d.php?t=715398 PayPal link to pay for your items: https://www.paypal.me/TKCR

06-30-2021, 06:30 PM	#9
Eyegore What Hump? Join Date: Apr 2003 Location: New River AZ Posts: 2,009	Re: What is this stuff called? Is this what your looking for? Dayco 80170 - Dayco Autoflex Defroster Duct Hoses ( 13 ) Part Number: DAC-80170 Dayco 80170 - Dayco Autoflex Defroster Duct Hoses Made in the USA https://static.summitracing.com/glob...80170.jpg?rep= $28.99 Dayco Autoflex Defroster Duct Hoses Duct Hose, Black, 2.50 in. Diameter, 6 ft. Length, Each See More Specifications \| Check the Fit In Stock (more than 10 available) __________________ Lil red 86 c-10 99 Sub 78 Camper Special w/ 454

06-30-2021, 06:39 PM	#10
69Tom Senior Member Join Date: Jul 2015 Location: Phoenix, AZ Posts: 1,333	Re: What is this stuff called? I just bought this. Has flat sheets of it in the kit. https://www.classicparts.com/1967-80...tinfo/HA-8708/

07-02-2021, 02:48 PM	#12
kglowacky Registered User Join Date: Mar 2020 Location: The Woodlands,Tx Posts: 562	Re: What is this stuff called? i buy it by the foot from my aftermarket car ac store. They sell custom ac hoses and complete aftermarket ac systems for hot rods.



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