| Business | Phone |
| Brown Refractory Svc 3545 W Morris St, Indianapolis 46241 | (317) 244-7678 |
| Empire Refractory Svc 7705 N Michigan Rd, Indianapolis 46268 | (317) 297-2703 |
| Fire Brick Engineers Co 2337 Executive Dr, Indianapolis 46241 | (317) 247-1447 |
| Refractory Engineers Inc 1750 Midwest Blvd, Indianapolis 46214 | (317) 273-2000 |