Ethylux Low Density Polyethylene (LDPE) is a semi crystalline olefin but with a lower density and a higher degree of ductility than Ultra Ethylux/HDPE. It has a wide range of appeal for food processing and packaging markets.

Ultra Ethylux High Density Polyethylene (HDPE) is one of the most widely utilized thermoplastics due to its relative low cost, weight/density, and range of properties. Although not recommended for high load, Westlake Plastics offers a normalized grade which enhances stress relief characteristics for applications requiring more extensive machining.