About Us
ST. LOUIS, MISSOURI
Expert Service
Custom Plastic Manufacturing Excellence Since 1971
For over five decades, Seiler Plastics Corporation has been a trusted partner in delivering high-quality custom plastic solutions. Based in St. Louis, Missouri, we specialize in custom plastic extrusion, injection molding, and serving a diverse range of industries nationwide.
Our seasoned engineering and manufacturing teams are experienced in the design and production of all types of products including:
