Polyurethane (Smooth-Cast Colour Match)

This fizzy, champagne-coloured, transparent resin is designed to be colour neutral so that small amounts of pigment will yield accurate, vivid colours. For this reason, it is often used to simulate materials like wood, marble or metal. Regardless of the end-product or even type of polyurethane you are using, the way in which you use polyurethane resins is always the same: the raw materials come in two parts, a liquid isocyanate (a very reactive chemical derived from petroleum) and a polyol (a long-chain alcohol), which are mixed to a specified ratio to create a reacting liquid, which is then poured into a mould or onto a surface and left until it cures to form a solid object. This relatively low-tech process makes it a useful material for tinkering and making prototypes.