Because I’m using the open bath for heating, yes a wiped film heater.
H-Christ!
Why make folks drag your required max temp out of you??
You could trivially have included three more words in your original post that would have made in clear.
…in your wiper…
Then folks could have made relevant suggestions from post 2 rather than post 23.
Which fluid? What temp?
Would solving “open bath” be a reasonable response?
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Yes please!
I use mineral oil, my temp is Max. at 190C. for distiller.
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Yeah, except the silicon based fluids seem almost as difficult to contain as helium…especially if you’ve got any npt fittings involved.
…so sometimes you get to cry more than once.
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my use temp is at 170C, but the mineral oil Im using now is getting dark and back very soon.
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@cyclopath is right about silicon based fluids. If you’re not used to or set up for them you can definitely find yourself chasing leaks in your system and cleanup can be a real pain in the ass.
The clean up will definitely leave you crying more than once lol! 
Especially if your reservoir is bigger than say 5L. We had to improve our leak testing/timing to account for that.
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