| Business | Phone |
| Houghton International Inc 5750 New King Dr # 350, Troy 48098 | (248) 358-1330 |
| Ppg Industries Inc 1200 Piedmont Dr, Troy 48083 | (248) 689-0720 |
| Scott's Specialty Gases 1290 Combermere Dr, Troy 48083 | (248) 589-2950 |
| Seal Peel Inc 2895 Strawberry Dr, Troy 48098 | (248) 540-8393 |
| Du Pont Automotive 835 Stephenson Hwy, Troy 48083 | (248) 583-4665 |
| Du Pont 1150 Allen Dr, Troy 48083 | (248) 583-8483 |