Adorable little water globe bottles!!
Never thought lubricant would have crafty purposes though. . .INDIE.CHILD
, KY Jelly has been used in the past as a lubricant when "turning" raw polymer clay on a wheel.
There's a great story around about some of the leading lights of the polymer clay community having a total blast buying tubes of the stuff at a local drug store while at a retreat or conference where that idea was first introduced. They were all standing in line to pay and began talking between themselves loudly enough for everyone nearby to hear about all the (double-entendre) ways they planned on using the lubricant (...if I could remember some of their actual comments, this would be much funnier!).
I hadn't actually heard of the silicone-based lubricants though (guess there are various types these days). Because of a couple of things I just read though, I'd perhaps
be a little concerned about the effect of this kind of lubricant on polymer clay over time:. . . Silicone-based lubricants are usually not recommended for use with sex toys or other products that are made from silicone because the formula will usually dissolve the surface making it sticky to the touch, and excess may cause disintegration of the item over time. In most cases a warning is listed on the product label. At least one manufacturer claims their silicone-based lubricant is safe for use with silicone products. . .
. . . By varying the -Si-O- chain lengths, side groups, and crosslinking, silicones can be synthesized with a wide variety of properties and compositions. They can vary in consistency from liquid to gel to rubber to hard plastic. . . .
My chemistry definitely isn't up to speed enough on details to know for sure but it seems that silicone is a type of plastic; and if it is and is not different enough from PVC plastic like polymer clay, uncured silicone in particular may begin to eat away at the surface of cured polymer clay over time (up to weeks/months later) softening it and leaving sticky, or even beginning to deform it, and perhaps discoloring the liquid. That's what happens when raw polymer clay or liquid pc or certain kinds of non-water-based liquids are in contact with cured polymer clay over time anyway.**
However, sometimes silicone-based glues are used to seal lids on or to hold the clay pieces down in snowglobes though haven't heard back about those many months later, so perhaps this wouldn't be a problem at all.
But I really don't know enough to say..maybe there are other chemistry-people reading this who know?
(Other clear liquids that are used in whole or in part with polymer clay in water-globes and snowglobes are things like water, glycerin, Dippity Do hair gel, mineral oil, colorless cooking oil, rubbing alcohol, etc.)
**This is a different problem than the whitish coating that cured polymer clay can get on it with continuous submersion up to 6 months later (especially noticeable on dark colors) due to slight water absorption, which also affects which kinds of liquids work best in snowglobes, etc .