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Typical Viscosity: 500 - 25000cst SG: 0.91 - 0.94Polyethylene and Polyurethane are types of Petroleum based plastics. Polyethylene is available in various grades depending on its intended use from plastic bags, foams to pipes. The grades in which it is available are known as Low Density Polyethylene (LDPE), Medium Density Polyethylene (MDPE), and High Density Polyethylene (HDPE).Polyurethane is used to manufacture foams used in soft furnishings from sofas, beds and mattresses, sponges, acoustic ...