Semco Plastic Company is centrally located in the greater St. Louis Metropolitan area. Our modern 400,000 sq. ft. plant rests on 17 acres and produces a variety of products 24 hours a day, 5 to 7 days a week.
We manufacture an extensive line of custom injection and blow molded thermoplastic and thermoset products. For over 65 years, we have provided our OEM and retail customers with advanced materials and innovative problem solving technologies.
Semco remains uniquely positioned to solve large volume custom molding needs. We accomplish this through our evolving technology and continuous research and development, and most of all, through honest commitment to our customers.
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