Plastics Engineering Company is a leading North American manufacturer of phenolic resins and thermoset molding materials, selling products under its trademark Plenco.

If you have a phenolic resin or thermoset molding material project, chances are, the Plenco team can make it work. We've been doing it for over 80 years.

Come and benefit from the Plenco difference.

Plastics Engineering Company, a family owned and managed business founded in 1934, established as its corporate mission a sincere desire to respond efficiently to the needs of our customers through development, manufacture, and servicing of useful, high-value products. Our mission is accomplished by an uncompromising adherence to customer requirements and safety in manufacturing, with consideration given to our environment and surrounding community, and with sensitivity to the needs of our employees.


Apply at or in-person at Plenco's Main Office, 3518 Lakeshore Road, Sheboygan (North entrance).

Plastics Engineering Company Awarded Bronze EcoVadis Medal

Plenco's Story, A Video Journey


Company Overview
Company Information
Company History
The Facilities
Research and Development
Customer Relations
Transparency in Coverage

Phenolic Novolac and Resol Resins
Phenolic Molding Materials
BMC/Thermoset Polyester Molding Materials
Melamine-Phenolic Molding Materials
Technical Service
Plenco Data Reports/SDS
Plenco Data Glossary
Technical Tips
REACH Statement
REACH Document
RoHS Document
Conflict Minerals Act Document
Plenco Processing Guide
Plenco Procesamiento de la guia
UL Listing from
Customer Support
Engineering Support
Materials Engineering Laboratory
Material Storage
Quality Assurance
Holiday Schedule
ISO Certificate
SPE Thermoset Division

Contact Us