Selecting the material depends on the production volume and desired finish. For high-volume architectural elements, Steel or Aluminum moulds are preferred due to their long-term durability and thousands of reuses, despite a higher initial price. For intricate designs or custom shapes, Silicone or Polyurethane (PU) moulds offer superior flexibility and detail, though they have a shorter lifespan. For basic construction and cost-sensitive projects, ABS or Polypropylene (PP) plastic moulds are the most economical choice, providing a balance between low unit price and decent reuse cycles (approx. 200-500 times).