Moulds can be used to form a distinct object from a metal bar, such as a holy symbol out of a silver bar. Moulds are most often used for crafting, though the ammo mould is used in conjunction with Smithing.

Most of the moulds can be bought from crafting shops. In free-to-play one may be found in Al Kharid and the other one in Rimmington. The ammo mould can be bought from Nulodion in the west building at the dwarven mines (after Dwarf Cannon).