Re-Design with Prima Mechanical Lock & Keys 5x8 Inch Mould (652159) £16.99 Quantity: at £16.99 each Add To Basket Stunning detailed design and high quality deep silicone mould. They are perfect for mixed media art, collage and more. Heat resistant and food safe. Size 5"x8" Use a variety of mediums to cast with, paper clay, resin and plaster. Do not mix between moulding food and craft products.