Alginates, initially used in dentistry as an impression material, are currently used by artists for making molds and lifecast. If you are looking for a skin safe molding material, you can always go for a silica-free formula. Such molding materials have greater coverage and are ideal for casting babies. You can approach EnvironMolds, the trusted suppliers of mold making and casting materials. Visit them at https://www.artmolds.com/ or call 1-866-278-6653 to know more.