What is this red stuff?

[Mark Nahrgang]

I saw this red "caulk" on a furnace and water heater flue where they connect to the stack.

What is it? And is it okay for this use?

[Chuck Evans]

Looks like high temp sealant to me. I think the stuff is rated for over 500 F temps.

[Mark Nahrgang]

Originally Posted by cevans

Looks like high temp sealant to me. I think the stuff is rated for over 500 F temps.

So it's a non-issue? Correct?

[Chuck Evans]

I wouldn't make it an issue

[Mark Nahrgang]

Thanks Chuck!

[Michael Larson]

You mean besides ugly?

http://www.acehardwareoutlet.com/(ix...ge=4166724.JPG

[Jeffrey Moore]

Hope it is the high temp sealant and not RedGard waterproofing sealing material.

[relliott]

It is rated well over 500 degrees.

I would be concerned they need patching at all though.
The straight B vent appears to be just that, as in Horizontal.(maybe even angled down)

[Wayne B. Wilson]

Originally Posted by relliott

It is rated well over 500 degrees.

I would be concerned they need patching at all though.
The straight B vent appears to be just that, as in Horizontal.(maybe even angled down)

Just what i was thinking

[Larry D. Kage]

They look like site made connections and when the caulk fails (and it will) leaks will start.

[Mark Nahrgang]

Thanks guys.

Here's what I said in the report:

• Observed the flue connection from the furnace and water heater, where they connect to the main stack, appear to be sealed with a red material similar to caulking. This appears to be what is known as a “high-tempertature-selant.” While this is likely not an issue, it is recommend to remove the material and replacement with proper flue sealant/tapes. Improvement.

[relliott]

Originally Posted by mnahrgang

Thanks guys.

Here's what I said in the report:

• Observed the flue connection from the furnace and water heater, where they connect to the main stack, appear to be sealed with a red material similar to caulking. This appears to be what is known as a “high-tempertature-selant.” While this is likely not an issue, it is recommend to remove the material and replacement with proper flue sealant/tapes. Improvement.

Yep sir

[Chuck Evans]

Originally Posted by mnahrgang

Thanks guys.

Here's what I said in the report:

• Observed the flue connection from the furnace and water heater, where they connect to the main stack, appear to be sealed with a red material similar to caulking. This appears to be what is known as a “high-tempertature-selant.” While this is likely not an issue, it is recommend to remove the material and replacement with proper flue sealant/tapes. Improvement.

Is there a tape rated for exhaust flue temps and intended for use on flues?

I usually write up tape on flue joints, I wouldn't have written anything for this.

[Russel Ray]

Originally Posted by cevans

Is there a tape rated for exhaust flue temps and intended for use on flues?

Yes.

[David P. Valley]

Hey, at least they didn't utilize duct tape. I've seen many vents with dried-up duct tape falling off.