Hi-Rel Plastics & Molding

Hi-Rel Plastics is a U.S. custom plastic manufacturer providing turnkey solutions from product design and prototyping to tooling, production, assembly, and fulfillment. Since 1984, we have specialized in custom injection molding, blow molding, rotational molding, thermoforming, vacuum forming, liquid silicone rubber (LSR) molding, insert molding, overmolding, cleanroom molding, and precision mold manufacturing for medical, aerospace, defense, automotive, electronics, industrial, consumer, agricultural, laboratory, and food industries.
Our engineering team helps optimize part design, material selection, manufacturability, and production efficiency. We process a wide range of commodity and engineering-grade thermoplastics, producing precision plastic parts with tight tolerances, consistent quality, and repeatable performance. From prototypes to high-volume production, Hi-Rel Plastics delivers cost-effective manufacturing, competitive pricing, fast lead times, and dependable U.S. production.
We also provide complete secondary services including CNC machining, ultrasonic welding, ultrasonic insertion, heat staking, heat insertion, adhesive bonding, pad printing, hot stamping, foil stamping, heat transfer labeling, painting, UV and EMI/RFI shielding coatings, annealing, texturing, engraving, assembly, packaging, inspection, and fulfillment. Our in-house capabilities reduce lead times, improve quality, simplify supply chains, and lower overall manufacturing costs.
Whether you need custom plastic parts, complex assemblies, medical devices, automotive components, industrial equipment, electronic enclosures, consumer products, or engineered plastic components, Hi-Rel Plastics delivers precision manufacturing backed by decades of experience, ISO-certified quality, responsive customer service, and on-time delivery.