A hot melt compound for the manufacture of flexible moulds based on vinyl resins. Suitable for casting polyester resin, plaster, epoxy and phenol-formaldehyde resins. This grade is of medium flexibility and can be melted at temperatures of 150-170 celsius and poured at between 140-150 celsius. Moulds are proof against water and many chemicals. They are also not affected by climatic conditions. The finest details can be reproduced and many casts can usually be made from one mould; the mould can then be re-melted, re-cast and used again. Non-toxic provided used in accordance with instructions.