Which Permatex (or other) gasket maker do people recommend for freeze plug replacement? This is for block freeze plugs, the receiver hole seems pretty good. Not a ton of pitting or corrosion.

The car parts store sold me Permatex anaerobic, but google AI is saying Permatex Form-A-Gasket #1 or #2. I assume both are wrong, so thanks in advance for the help from this group! dave w.

1991 W124 300D 2.5 turbo.

I have done freeze plugs on various vehicles over the years and used permatex, gasket shellac, and even wet spray paint. Basically anything that is non-soluble and a little sticky to seal any little roughness in the block holes, at least with steel plugs. Brass plugs are likely soft enough to just go bare and fill in minor rough bits. Since I posted a pretty shade tree solution someone will likely come along and give 'better' solutions.

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1985 300D
The rest:
1957 MGA (comatose)
1965 Falcon (sleeping)
1966 E-100 (rust test in progress)
1976 Ford 3400 D Tractor (workhorse)
1978 Mercury Zephyer (5L playtoy)
1995 Isuzu NPR D (fetcher)
1998 Subaru Legacy (Spare)
2000 Toyota Sienna (School bus)
2008 Toyota Prius (Commuter)

Well for a long-time companies like Permatex and Loctite have made goop that is for feezed plugs.

Personal opinion.
Having started working on cars in the 1960's I used the old school brown thick hardening and non-hardening Permatex. Messy but totally reliable.

You need to sand the holes and if there is pits in the holes get the rust out of the pits. Spray or wipe on a rage with brake cleaner. Likewise degrease the plug and coat the hole filling in any pits and the plug also. The excess mostly ends up on the outside. Give it time to set. Even the non-hardening gets stiffer.

I personally give the edge to the hardening Permatex.

Another old school thing was to use brass freeze/core plugs. I have no idea if those are available for Mercedes.

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84 300D, 82 Volvo 244Gl Diesel

Looks like brass is still a thing for my 300D (34mm) even the amazingly big river website has them.

__________________
1985 300D
The rest:
1957 MGA (comatose)
1965 Falcon (sleeping)
1966 E-100 (rust test in progress)
1976 Ford 3400 D Tractor (workhorse)
1978 Mercury Zephyer (5L playtoy)
1995 Isuzu NPR D (fetcher)
1998 Subaru Legacy (Spare)
2000 Toyota Sienna (School bus)
2008 Toyota Prius (Commuter)

What is the big river website??? And why do we tip toe around here? If our host company doesn't sell what we need, why should they care where we can get it? I'm sure they don't.

Not being rude but I guess take it up with the moderator first and you can email peachparts.

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84 300D, 82 Volvo 244Gl Diesel