Which anti-seize for O2 sensors?

[JohnK]

I'm in the middle of replacing the headers on my gen2 coyote, and need to re-install the O2 sensors in the new headers. Permatex makes three different types of anti-seize - aluminum, copper, and nickel. My "go-to" anti-seize for most things is Permatex nickel anti-seize. However, when I look at the descriptions of each one on Permatex' website (https://www.permatex.com/product-category/lubricants/anti-seize-lubricants/), none of them mention being "sensor-safe" in the description but the copper anti-seize is the only one that lists O2 sensors under "suggested applications." Does this sound right, or is there some other type of anti-seize specific to O2 sensors that I need to hunt down? Google has failed me on this, as most search results just warn to use a "sensor safe" anti-seize, or an electrically-conductive anti-seize.

[Fman]

I just used the high temp 1600 anti seize (81343) on my o2 sensor and it has been fine now for 4800 miles. You don't need much, like a small dab will do ya. Not sure if this is actually the best one for o2 sensor but I was more concerned about the 1600 degree temp rating.

[JohnK]

Thanks Travis. Yeah, the choice of which one to use is a bit confusing. The temp ranges of the three Permatex anti-seizes are:

Standard (alum/copper/graphite mix): 1,600*F
Copper: 1,800*F
Nickel: 2,400*F

So the nickel has the highest temp rating, but I believe the copper is more electrically conductive, which is why I think the copper is the recommended one. More google searching for "sensor safe anti seize" generally turns up copper-based varieties so I think I'm going to go with this unless someone feels strongly otherwise.

[Windsor]

I've used copper for O2 sensors with no ill effect.

[Dgc333]

FWIW, when you purchase O2 sensors they have anti seize pre applied. It is not copper based, looks very similar to the can of nickel based anti seize I have been using for years.

[weendoggy]

I've been using Permatex Anti-Sieze my entire career and have never had an O2 issue on any vehicle. Key is keeping it OFF the sensor part and not using a bunch of it. Use the same stuff on spark plugs and every bolt/nut I put in. jmo

[JacobusLemmens]

In general, copper anti-seize is a good choice for O2 sensors because it is non-reactive and has a low potential for interfering with the sensor's function. In addition, it's important to use the anti-seize sparingly and only on the threads of the O2 sensor to avoid any interference with the sensor's operation. Permatex copper anti-seize or Loctite LB8008 C5-A will work well.

[Mastertech5]

GM dealers use an anti -seize specific for O2 sensors. It uses graphite with micro glass beads impregnated in it.
PN 12377953 . It's called Dry Film anti-seize lubricant. You need to let it dry before installing the sensor. The parts number many have changed, since I've had this can for many years. It will dry out of not kept tightly capped. Denso sensors come with what appears to be copper based anti-seize on the thread or in a little squeeze plastic applicator.

[mikeinatlanta]

... and we haven't even gotten into if the sensor is installed in mild steel, 201, 304, 321, or 409 stainless.