The Marshall Gruber Company LLC is a subsidiary of The R.J. Marshall Company. Marshall Gruber is dedicated to providing supplies and accessories for cast polymer manufacturing. Marshall Gruber is also a sales agent for Gruber Systems, and offers all Gruber Systems’ products, including molds for cultured marble and solid surface manufacturing, as well as Gruber’s full line of production process control equipment such as the well known Autocaster continuous casting system.

The R.J. Marshall Company was founded by Richard J. and Joan E. Marshall in May of 1978. Originally conceived as a manufacturer representative company, R.J. Marshall sold commodity grade industrial raw materials. Soon, they found a way to offer a solution to the inconsistent quality of materials drawn from individual mines: a better way to achieve the best possible properties from batch to batch. This kind of consistency and quality has been the hallmark of the R.J. Marshall reputation even today.

Marshall Gruber Company can service a full range of solutions and technical expertise to manufacturers – for a variety of applications. For more information about available products for your needs, please see our Products page.