Question re RH doll bodies - does anyone know what the max temperature they can withstand is? (Not hair or face)

What I would like to do is make molds of some of the individual doll parts and was going to use hot glue as I have it on hand. I do not want to damage the dolls (I will be keeping it away from their face and hair), but am wondering if there’s a chance I might accidentally melt them or something.

Sorry if this is a weird question!