Oy Masterplast Ltd Masterplast is a Finnish plastic fabrication company founded in 1988. From Masterplast you will get tailor made fittings, vessels, basins, special parts and various other products that are all fabricated in accordance with the ISO 9001:2008 quality control system. Our methods include CNC-machining, five-axis CNC-machining and blow moulding. We are specialized in further refining plastic sheets to a suitable form, prototype manufacturing and making individual component from various plastics. Masterplast is proud to have a experienced and knowledgeable staff and we are confident in the fact that we can provide you with the most demanding objectives from design to installation together with our co-operators.