Welcome to Premix-Hadlock Composites, LLC

Custom-Molded Composites Built for Strength, Precision & Performance

At Premix-Hadlock Composites, we manufacture advanced fiberglass and carbon-fiber reinforced thermoset components engineered for demanding environments. Our parts are designed to reduce weight, optimize performance, and hold up under extreme conditions delivering lasting value across industries.

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60+ Year Of Experience
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ABOUT US

Your Trusted Partner in Thermoset Molding and Composite Innovation

With over 60 years of industry experience, we specialize in cost-effective thermoset conversion and custom molding solutions. Our expertise in compression, transfer, and injection molding enables us to support a wide range of projects from intricate, low-volume runs to high-efficiency mass production.

Through smart design, durable materials, and precision tooling, we help companies replace traditional materials with lightweight, high-strength composites that deliver results.

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The Power of Thermoset Composites

Lightweight. Durable. Heat & Chemical Resistant

Our molded thermoset composites including BMC, SMC, and carbon-fiber reinforced materials are designed to:

Withstand extreme temperatures and chemical exposure

Reduce part weight and improve energy efficiency

Enable complex shapes with excellent dimensional stability

Deliver long-term strength and performance

Ideal for sectors like heavy truck, HVAC, electrical, industrial, and electrified transportation (EV).

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Custom Molding Solutions

Efficient, Scalable, and
Built to Spec

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Our full-service molding capabilities include:

  • Compression, Transfer & Injection Molding
  • Low- and High-Volume Production
  • Low- and High-Volume Production

Each part is crafted with a focus on reducing waste, minimizing cost, and achieving the highest quality standards.

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Full-Service Project Support

From Material Selection to Final Delivery

We provide end-to-end engineering and manufacturing services to bring your product to life:

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Product Development

We collaborate with top material partners to select the optimal resin or reinforcement system.

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Design Engineering

Our in-house team helps refine part geometry and performance while reducing manufacturing complexity.

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Prototyping

Quickly validate your design with high-fidelity prototypes.


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Manufacturing

Efficient production with a focus on repeatability and quality.

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Finishing & Decoration

Post-mold services including painting and assembly.


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Automation

Robotics and advanced part-handling drive cost savings and consistency.

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Our Products

Engineered to Perform. Built to Last

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Our components are trusted in high-performance applications where durability matters. We offer:

Engineered Thermoset Composites

Including BMC, SMC & Carbon Fiber

Complex Molded Parts

Produced with precision and speed

Automated Solutions

Ensuring consistency, quality, and scale

Decorative Finishing

Including painting, labeling, and post-processing

Why Choose Premix-Hadlock Composites?

Proven Expertise

Over 60 years of composites experience

Custom Capabilities

In-house tooling, engineering, and automation

Certified Quality

ISO 9001:2015 & IATF 16949:2016

Customer-Centric

Flexible production volumes and collaborative partnerships

Industry Versatility

Serving transportation, industrial, HVAC, electrical, and more

History

COMPANY HISTORY

A detailed look at the Giancola Family’s journey through generations of business leadership, strategic growth, and landmark achievements.

  • GMR was founded by Giancola, Marino & Rossi
1984
  • Ralph Giancola & Tony Giancola acquire the shares of Marino & Rossi
1990
  • GMR acquires the assets of Zehrco as a seperate company
2003
  • Industrial Molded Plastics & Jefferson Thermoplastic Company are acquired
2009
  • Pickens Plastic is acquired
  • Tony Giancola becomes President & CEO
  • GMR Materials Technology in Bolivar OH is acquired
2010
  • Insert Percision Molding in Warren, PA is acquired
2015
  • Suburban Plastics in Grenada, MS is acquired
2019
  • PremixHadlock in Ashtabula, OH is acquired
2022
  • Insight Global Skyware in Smithfield, NC is acquired
2024
  • Thermoset Inc. in Monterrey, MX is acquired
2025

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Get in Touch

Request a Quote Today

Ready to get started? Simply fill out our form, and we will get back to you as soon as possible with a detailed quote tailored to your needs.

We look forward to hearing from you and partnering on your next molding project.

Call: 440-335-4301
Sales: 440-335-4264
Visit Us: 3365 E Center St Conneaut, OH 44030
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