Does it work for sodering irons too?

If your holding by three handle shouldn't be hot... However I use these to pick up my mugs after pressing them for several minutes at over 375 degrees. They are super hot and these gloves protect me... Bought two pair.

Can I use these to protect my hands when I exercise with resistance bands?

Yes you can. May not be super comfortable with the heat resistant bumps.

Are these good for baking?

“2, Only use for preventing your hands from being burned by the hot styling tools, like curling iron, straightener, clothes steam iron, curling wand, hot-air-brushes; 3, can not be used for holding hot pots ,handling hot food“ Sounds like its only to prevent accidental touches and not act like over mits. Upsetting to me because i ordered it to hand hot glass off a heat press

Can they be used wit clothes steamer

i don't know. i use them to hold very hot ceramic..but it is dry heat. the black part is a woven kind of cloth material... it might allow the steam to penetrate.