MET-L-FLO Engineering Company was founded in St. Charles in 1969 as a consulting company for the wire metal forming industry. The main focus was to support tooling, trouble shoot, maintain equipment and provide appraisals for cold, warm, and hot forging machines. Such services were performed for multi-million dollar corporations, both domestic and foreign. On July 11, 1988, MET-L-FLO Engineering was incorporated and became known as MET-L-FLO INC. within the state of Illinois.

In 1990, MET-L-FLO INC. recognized a need for plastic prototypes in production-like materials resulting in the subsidiary, PLAS-T-FLO. The goal was to create silicone molds from Stereolithography models and then create castings is a production-like material from the mold. As Stereolithography improved, Original Equipment Manufacturers (OEMs) began to purchase machines, resulting in a broader market scope for PLAS-T-FLO. After considering the best means to penetrate OEMs, it was determined that PLAS-T-FLO could use existing Vendor Codes to ease entrance into the OEM Market. For this reason, PLAS-T-FLO was dissolved and MET-L-FLO INC. began to service the prototyping industry. MET-L-FLO INC. was able to capitalize on their existing vendor codes and began to service large OEMs with silicone molds and urethanes.

By April of 1996 the demand for plastics prototyping became so great that it justified the purchase of Stereolithography equipment. MET-L-FLO INC. was now able to provide Stereolithography services to the smaller OEMs that were not able to justify the large capital expense of purchasing their own prototyping equipment. It was at this time that MET-L-FLO INC. finalized the transition to a full service prototyping service center. The continued success of prototyping allowed MET-L-FLO INC. to focus all their efforts in this area and to discontinue the original forging support side of the company.