Strong Experience in the Injection Molding Industry
In 1966 three friends, B.L. Jacquet, L.L. “Mack” McKay Jr., and J.F. Cox, came together with their TW-3ideas, experience and drive to form JMC Plastics and Manufacturing. The company initially operated out of the garage of McKay’s home. As the business grew, JMC relocated to its current location in north Houston. Mack McKay later bought out his partners and continued to expand the company through the years, purchasing adjacent land to grow the business and adding machinery. Upon his death in 2003, Mack’s nephew, Randy Hammond, took over as president of JMC and ran the company until his passing in 2012. The McKay family sold the business to the Robertson family, also of Houston, in 2013 and the company was renamed RMC Plastics, Inc. The company carries on the traditions and mandates of its founders: to produce the highest quality products possible at the very best value.
Injection Molding Machinery
We operate 12 injection molding machines of differing sizes to meet your product needs. We also have the capacity for large part runs and will perform quick changeovers for immediate needs.
Family Owned & Responsive
Why work with a family owned company? In short, we appreciate our customers more than larger corporations. When you work with RMC you work with the owners, and we invest time and energy into your project. We are flexible, nimble and can make decisions quickly. Your success is our success, and RMC Plastics will go above and beyond to help you and your company beat the completion.
With solid experience and true customer commitment, RMC Plastics is focused on timely delivery, quality products and proven value.

Industries Served
- Consumer Products
- Oil & Gas
- Electric Utility
- Gas Utility
- Water Utility
- Construction
- Plumbing
Medical

Brands We Are Proud To Work With
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Haitian International | haitianinter.com | Global leader in plastic injection molding machines. Known for efficient, reliable, and cost-effective equipment. |
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Nissei Plastic | nisseiplastic.com | Japanese machine builder since the 1940s. Renowned for dependable injection molding technology. |
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Borche | borcheglobal.com | Chinese manufacturer of energy-saving “smart” injection molding machines since 2002. |
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ENGEL | engelglobal.com | Austrian company producing advanced molding machines and automation systems worldwide. |
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Moretto | moretto.com | Italian firm providing plastics automation & auxiliary equipment to keep production efficient. |
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Van Dorn Demag | sumitomo-shi-demag.us | U.S. (Ohio) machine builder, known for robust designs. Legacy brand now supported by Sumitomo Demag. |
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Dow | dow.com | American materials science giant—plastics, performance materials, and chemicals with sustainability focus. |
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LyondellBasell | lyondellbasell.com | One of the world’s largest producers of polyolefins, pushing innovation in recycling and sustainability. |
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LG Chem | lgchem.com | South Korea’s largest chemical firm—advanced materials, petrochemicals, and batteries. |
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SABIC | sabic.com | Saudi petrochemical leader producing plastics, chemicals, and metals with global reach. |
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Chi Mei | chimeicorp.com | Taiwanese company—world’s top ABS resin producer. Also makes specialty plastics and rubbers. |
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BASF | basf.com | German chemical powerhouse—everyday plastics to cutting-edge sustainable materials. |
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Celanese | celanese.com | Global materials leader producing specialty polymers and chemicals for industry. |
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DuPont | dupont.com | U.S. pioneer in advanced materials—performance plastics, electronics, and safety products. |
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INEOS | ineos.com | One of the world’s largest chemical groups—broad plastics and petrochemical portfolio. |
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Ascend Performance Materials | ascendmaterials.com | Houston-based leader in nylon 6,6 and high-performance materials. |
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Avient (PolyOne) | avient.com | Specializes in polymers, composites, and colorants. Formerly PolyOne. |
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Delrin (DuPont Product) | dupont.com/delrin | Acetal resin brand by DuPont—durable, low-friction plastic for mechanical parts. |
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Pinnacle Polymers | pinnaclepolymers.com | U.S. polypropylene producer—fast turnaround and reliable supply. |
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Nova Chemicals | novachem.com | Canadian polyethylene producer—strong focus on sustainability and recycling. |
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Ravago | ravago.com | Belgian family-owned group—leader in polymer compounding, distribution, and recycling. |