Metrosil Plus – is a two part addition cured silicone for the accurate duplication of master models. Mixed in a 1:1 ratio the material is blended to a uniform colour before pouring. Compared to reversible gels, silicone duplication has always been considered expensive. However, the growth of private and implant work has placed demands on the dental laboratory for high levels of accuracy and precision. Metrosil Plus has excellent dimensional stability at an economical price. Previously set material, which has been chopped, can be added to the mould as a filler to reduce the volume of new material used.