?- Astroseal Products Manufacturing Corp.
- PPG Engineered Materials
- Dayton-Granger Inc.
- The Gill Corporation
- Parker Hannifin Corporation
- Microsemi (Microchip Technology Inc.)
- Henkel AG & Co.
- Hydra-Electric Company
- AEF Solutions
- Conductive Composites
- Technical Fibre Products Ltd
- A.P.C.M. LLC