# Seiler Plastics Corporation

> Family-owned U.S. manufacturer of custom plastic extrusions, tubing, sheet, and injection molding. Based in St. Louis, Missouri since 1971.

Seiler Plastics produces custom extruded plastic profiles, extruded sheet, custom tubing, and injection-molded parts for industrial customers. Two facilities in St. Louis, MO. ISO compliant quality systems. Injection molding machines from 60 to 450 tons.

## Pages

- [Home](/): Overview of Seiler Plastics capabilities and company.
- [About](/about): Company history, locations, and values — family-owned since 1971.
- [Contact](/contact): Request a quote, phone, email, and St. Louis facility addresses.
- [Privacy Policy](/privacy): How information submitted through the site is handled.

## Capabilities

- [Plastic Profiles](/plastic-profiles): Custom extruded plastic profiles and shapes.
- [Custom Profile Shapes](/plastic-profiles/custom): Engineered custom profile extrusions.
- [Profile Materials](/plastic-profiles/materials): HDPE, LDPE, ABS, PVC, Butyrate and more.
- [Plastic Sheet](/plastic-sheet): Extruded plastic sheet, thin and thick gauge.
- [Die-Cut Sheet](/plastic-sheet/die-cut): Die-cut plastic parts from sheet stock.
- [Custom-Size Sheet](/plastic-sheet/custom-size): Plastic sheet cut to custom sizes.
- [Sheet Materials](/plastic-sheet/materials): Resins and gauges available for sheet.
- [Plastic Tubing](/plastic-tubing): Round, oval, rectangular, and triangular plastic tubing.
- [Polyethylene Tubing](/plastic-tubing/polyethylene): HDPE and LDPE tubing capabilities.
- [Custom Tubing](/plastic-tubing/custom): Custom-engineered tubing extrusions.
- [Tubing Materials](/plastic-tubing/materials): Resin options for plastic tubing.
- [Injection Molding](/injection-molding): Custom injection molding, 60–450 ton presses.
- [Engineering Support](/injection-molding/engineering): Solidworks design for manufacturability.
- [Production Molding](/injection-molding/production): Full production injection molding.
- [Quality](/injection-molding/quality): ISO compliant quality systems and inspection.
- [Injection Materials](/injection-molding/materials): Resins used in injection molding.
- [Other Services](/other-services): Secondary services beyond extrusion and molding.
- [Die-Cut Services](/other-services/die-cut): Die-cutting of plastic materials.
- [Hole Punching](/other-services/hole-punching): Precision hole punching.
- [CNC Routing](/other-services/cnc-routing): CNC routing of plastic sheet and parts.