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You know how satisfying it is when you finally find a bottle that nests perfectly inside your other gear. I finally found a short, squat bottle that just fits inside my Imusa mug, for holding alcohol.
BUT, the bottle's lid could use a gasket. On store-bought lids there's often a waxy, plastic-y ring of white material for sealing the lid. What is that stuff? I could rob another jar for some (but then that jar has no seal). What would make a good substitute lightweight gasket?
historically it was wax, no they use plastic. I don't which exact type of plastic though…. it could be teflon unless they have found a cheap alternative that works as well (or better)
Teflon sheet cut into a circle/ring would be very good, though it might be hard to get ahold of the material. I would suggest wax paper or freezer paper but it probably wouldn't hold up to the alcohol. Dig around and see what thin plastic sheet you can find. then test to see if it holds up to the alcohol.
OK thanks. Milk jug maybe? I'll give it a shot.
A teflon washer of the precise diameter would be great, but I've never seen a teflon washer this big, just under 1-1/4".
EDIT: I'm a compleat idiot. I just remembered I have a partial roll of FloorMuffler underlayment foam. Now to test it for alcohol resistance.
Use a good micrometer to measure the size of gasket you desire, then search on McMaster-Carr for a silicone o-ring that fits.
Use 1/8" sheet cork. Available in craft stores.
Great ideas. Thanks guys.
The FloorMuffler test appears to be a win, also…alcohol bottle upside down for the past several hours, no leaks, no impact to the FM. One more option to add to the list.
> for a silicone o-ring that fits.
Check the chemical compatability first. I know silicone O-rings are contra-indicated for butane and propane. Viton might be better.
Cheers
Interesting chart. For Ethanol, it says don’t use Nitrile, Silicone, Flurocarbon (ie Viton) or Urethane. I stumbled on FloorMuffler, which is a cross-linked polypropylene. It may be chemically similar to Ethylene Propylene. (Ethylene is a common copolymer for polypro). If so, the FloorMuffler would be a recommended gasket material for Ethanol and Methanol.
The main reason I was pretty sure about silicone is that my other main hobby is flying model aircraft, whose engines' fuel is a combination of methanol (mainly) and nitromethane, with all fuel tubing and 0-rings made of silicone. Actually, I fly almost exclusively electric powered models these days, but I have burned many a gallon of methanol.
Viton and nitrile are great for gasoline engines, as well as tygon and tygothane (which has much better cold-weather characteristics).
An interesting comparison is brake fluid (not silicone brake fluid), which is an alcohol. Rubber compounds that work well with petroleum fluids will not work with brake fluid and vice versa. SBR and natural rubber are both rated for alcohol. Nitrile, which is common for petroleum based fluids is not.
" Viton might be better."
compatibility aside, viton (which i prefer for some things), can be overly sticky in occasional applications.
just a thought.
and yes, a McMaster Carr account is a necessity for civilized existence.
Can you cut out the gasket/ring from a liquor bottle?
Otherwise, painting on a layer of 100% silicone (caulk used for seam sealing) may just do the trick.
>"Can you cut out the gasket/ring from a liquor bottle?"
Taking that excellent suggestion a step further: Take your pot to the liquor store. Find some liquor container than is a good fit. Buy it. Invite friends over. Drink the contents.
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