Flourinert FC-40

[f012t12]

Does this mineral oil cost so much because 3M is the only manufacturer or is it because the raw material used is extremely expensive, or possibly is it simply that the process is complex and time-consuming?

I can't imagine a gallon of liquid should cost so much friggin money!

Especially when there's plenty of people willing to purchase it... well... err... maybe I'm thinking the world revolves around me...

But anyhow, it still doesn't make much sense.

[TheGhengisKhan]

I'm not sure exactly why, or how much FC-40 costs, but I do know that FC-72 costs around $400/Gal

But I personaly believe it's due to the complicated, and intricate methods used to create it.

[f012t12]

Well, if you visit or already have visited www.octools.com, there's a section on a home experiment submerging a motherboard in FC-40.

They mention purchasing 2 gallons from 3M. I can't imagine they paid 300-500 or even more per gallon.

I think FC-72 is designed to reach more extreme temperatures... From what I saw on 3M's website.

[snvpa]

I believe it costs so much due to the creation of the product. It wouldn't be so bad if it was just dielectric. its that it doesn't freeze as well that costs the money. Other companies could make the product as 3m's patent expired decades ago I'd imagine since none do its just too expensive to make.

[f012t12]

I see.

I only want to go no lower than -10C, not -110C.

What other liquids exist that arn't noticeably viscous at those temperatures that are non-toxic nor corrosive or harmful to circuitry?

[syadnom]

ok, how about a very thin, synthetic motor oil. castrol syntex is dielectric I believe, and synthetics are fluid to lower temperatures. maybee a 5w30 or 5w20 Racing Oil.

[f012t12]

Flamability?

What goes? Does motor oil evaporate? So i could drench an operating chipset and not worry about anything without having to spray a tar glue