Agreed, the chrome suck... One would think the heavy billet though would be the schnizzleJust stick with what works, I never used the O ring type but had bad luck with the chrome ones leaking.
Just don’t buy the oring seal thermostat housing where the outlet swivels. Those ones never seal properly as there will always be a small gap between the surface that swivels, and the rest of the housing. That’s really the style I was referring to when I stated they don’t seal forI grew up in the " Cal Custom" JUNK chrome era..... I really question anything chrome.
The heavy Billet Aluminum housings are the ones that I am asking about..
5L5 answered the question the best on here with an Oring being a POOR seal for a pitted area....
I have a BMW and it is full of oringed type seals..... Even the hoses work on an Oring type seal....
When they work they are great, when they don't, they don't...LOL
.Mr. Gasket is owned by the same corp that bought out Holley and more. Who knows who’s part has been packaged for retail display. They are not the absolute junk they were, but when the Mr.G packaging has more cardboard than the gasket, Felpro is the best bet, and Victor Reinz is cheaper and is still a better part that the shrink wrapped stuff.First, get out of the 'Mr Gasket dark ages'. You pay twice or more for a pos that you can get from the local parts store or even make yourself.
and as for that BMW, a lot of the new stuff built today has a slot type mating surface that uses a rubber rope looking gasket because the surface tolerances are much tighter, flatter and just better maternal or they use a silicone type stuff in a tube to seal, I think most, if not all cars built today don't even use flat gaskets anymore.
As a younger man it seemed that T stat leaks were fairly common... I have been out of building engines for years.... If you look at this particular gasket, it is really unique..... Anyone had any experience with it?Mr. Gasket is owned by the same corp that bought out Holley and more. Who knows who’s part has been packaged for retail display. They are not the absolute junk they were, but when the Mr.G packaging has more cardboard than the gasket, Felpro is the best bet, and Victor Reinz is cheaper and is still a better part that the shrink wrapped stuff.
What engine and year?As a younger man it seemed that T stat leaks were fairly common... I have been out of building engines for years.... If you look at this particular gasket, it is really unique..... Anyone had any experience with it?
Seriously? I can't remember what I had for breakfast most of the time........What engine and year?
And the non hardening form a gasket/aviation sealer #2 will cover many surface imperfections.
If you don’t know what vehicle you are working on, I sure don’t either.Seriously? I can't remember what I had for breakfast most of the time........
Probably Small and Big block chevy's.......

Ok, I thought you were asking what engines from my past I had Tstat leaks with......If you don’t know what vehicle you are working on, I sure don’t either.
This gasket looks slick. Unless you are planning on taking it apart frequently, it’s serious overkill.
Mr. Gasket 737G Thermostat Gasket Amazon product ASIN B01JP2FUR6View: https://www.amazon.com/dp/B01JP2FUR6/ref=cm_sw_r_cp_api_i_94G7HQ7M7T6Z195HAST5
I read you sold a Dodge, but we don’t know what cars Bentley might still have.Ok, I thought you were asking what engines from my past I had Tstat leaks with......
83 302 intake/tstat cover

WHOA, I just notice the price..... Thats NOT gonna happen.....If you don’t know what vehicle you are working on, I sure don’t either.
This gasket looks slick. Unless you are planning on taking it apart frequently, it’s serious overkill.
Mr. Gasket 737G Thermostat Gasket Amazon product ASIN B01JP2FUR6View: https://www.amazon.com/dp/B01JP2FUR6/ref=cm_sw_r_cp_api_i_94G7HQ7M7T6Z195HAST5