I’ve tried using different types of handle gloves for my Matfer and Darto carbon steel pans and bought a couple from De Buyer that works pretty well (I actually bought these two for my De Buyer Mineral B Pro pans, but the SS handle stays pretty cool during frying/searing), but I soon found out that when I sear steaks the De Buyer gloves will get totally filled with oil splatter.
So here I’ve tried different solutions, and even though aluminum foil is heat conductive, some how the handle stays pretty cool during the searing process and as soon as I’m done with the high heat sear part I’ll remove the foil and have a clean handle.
I’m not a chemist , so I can’t say why heat conductive alu foil works and keep the handle pretty cool, maybe it’s because I don’t wrap it tighly around the handle, but it works for me on my Darto’s.