Mold-Masters Co-injection, formerly KORTEC®, allows two different resins to be combined into a single 3-layer melt stream. This specialized process can be used to enhance part performance and cost without any penalty to cycle time or production volume. Depending on the materials selected and the application, Co-injection can be used to extend shelf life, improve production efficiencies and allow for greater design flexibility. The Technology is compatible with High Performance Barriers, Bio-Resins and PCR/Scrap. Mold-Masters Co-injection can be used for a wide range of applications across any industry including preforms, thin wall containers, closures and much more.

As the pioneer and industry leader in Co-injection Technology, Mold-Masters has extensive co-injection science knowledge and the most application experience. The world’s leading brands rely on Mold-Masters Co-injection Technology to deliver solutions that outperform. Contact us with your application today.


Mold-Masters Co-injection Technology adds value to a wide range of everyday products.


Mold high quality, economical, co-injected parts for less.

Hot Runner System

Improving everyday products. Preserving freshness, maintaining flavor and extending shelf life.

Klear Can

The ideal alternative to metal cans for fruits, vegetables, soups, meats, & much more.