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The Magnificent
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Since petroleum based lubricants are a no-no with certain types of seal and o-rings, water based lubricants seem to be the way to go.

Here's a link to making a water based lubricant out of corn starch and water.
http://www.instructables.com/id/Personal-Lubricant/#step1

I wouldn't imagine the little bit of corn starch residue left after drying would hurt anything.

Seems like this would beat soapy water for seating beads on tires too.
 

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Senior Tinkerer
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Since petroleum based lubricants are a no-no with certain types of seal and o-rings, water based lubricants seem to be the way to go.

Here's a link to making a water based lubricant out of corn starch and water.
http://www.instructables.com/id/Personal-Lubricant/#step1

I wouldn't imagine the little bit of corn starch residue left after drying would hurt anything.

Seems like this would beat soapy water for seating beads on tires too.
Happened to run across a link that makes some tire mounting lube recommendations:
http://www.cooksvilletire.com/techarticles/mountdemount.htm

Toward the end they talk about using vegetable oil and some other types of lube. Seems like vegetable oil would be a handy alternative to soap for this purpose?
I never liked the idea of having water left inside the rim when using soapy water to seat a tire.
 

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I wouldn't imagine the little bit of corn starch residue left after drying would hurt anything.
Actually, its a fine abrasive. Dry corn starch makes a great buffing agent for your car, especially on black.

Vegetable oil gets sticky like glue after it sits a while, not good in the long run.

If you need a lubricant for rubber o-rings and seals that can degrade when exposed to a petroleum based product, the proper lube is silicone grease. Thats what its made for.
 
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