I’ve used thin rubber gloves before for this purpose, and yes, i would agree that most of them don’t offer any warmth per se and some feel cold without insulation over them.
That’s why i’m excited by the butyl rubber. Butyl rubber gloves are not common in home improvement stores or automotive stores. It seems that nitrile and to a lesser extent latex, have become the most common materials for gloves in these and other brick and mortar stores that most have access to. Yet, nitrile is fairly conductive which is not so great for cold weather.
Again, if you look at the conductivity difference between butyl and nitrile, there is a pretty significant difference, with butyl being almost 3 times less conductive.
For a solid material that isn’t infused with a gas of some kind (like foams or aerogels are), butyl rubber having a .09 thermal conductivity is impressive and fairly low (slightly better than polypropylene which is the least conductive material commonly used for clothing).
So unless you’v tried butyl rubber gloves specifically in those conditions, it makes no sense in automatically dismissing them. As Dustin pointed out, they are inexpensive and in that sense, worth trying out. I ordered two pairs for 9 dollars. They can probably be found cheaper than that.
A general ps to my earlier posts. I’ve decided to not add anything to them to boost insulation. Giving it a little thought, older style aerogel would be kind of stupid to begin with, as it would just ground down most likely, and CO2 gas would probably be a pain to efficiently trap in them.
I did think that styrofoam micro beads would work pretty well for this application, but then i would have to purchase a larger bag of it, as well as buying larger butyl gloves, so i think i will just stick with traditional over insulation for this one. If i wasn’t lazy, impatient, and semi-broke, i’d might try a combo of styrofoam micro beads with CO2 gas in between two differently sized butyl rubber gloves for curiosity’s sake. The combo of two layers of non permeable butyle rubber, styrofoam micro beads, and CO2 gas would provide pretty impressive insulation, but perhaps too much so for most conditions that i would experience (and thus make my hands sweat too much).