ISO 13485 Certified Injection Molder

In-House Tooling

Injection Molding - Thermoplastic and LSR

Cleanroom Molding & Assembly

Finishing

Seaway Wright
Seaway Plastics 211
Wright Employee Works in Cleanroom
Seaway Plastics 257

OUR SERVICES

MOLD DESIGNING & TOOLING

MOLD DESIGNING & TOOLING

Seaway Plastics can quickly build all-aluminum molds, aluminum-and-steel combinations or all-steel molds, ranging from Class 105 to Class 101. Our highly qualified engineers can guide customers to the optimal materials based on desired resin, number of anticipated shots, tolerance requirements, and expected life of the mold.

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PLASTIC INJECTION MOLDING

Plastic Injection Molding

Let Seaway Plastics seamlessly guide you through the plastic injection molding process. We have decades of experience processing over 700 different types of resins including Liquid Silicone Rubber. Our engineers help customers choose the right machine, best construction methods, and complete DFM support for their projects.

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CLEAN ROOM MOLDING & ASSEMBLY

Clean Room Molding & Assembly

Seaway Plastics has clean room molding and assembly space to cater to customers in the medical, and other highly regulated industries who need to ensure their parts are clean before arrival and use. We have over 35,000 square feet of ISO Class 7 & ISO Class 8 clean rooms. Seaway offers clean room plastic injection molding, LSR molding and product assembly.

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LOW-TO-MID VOLUME INJECTION MOLDING

Low-to-Mid Volume Injection Molding

Seaway Plastics offers low-to-mid volume plastic injection molding; we classify batches ranging between 100 and 10,000 pieces as “low volume”. Whether you’re a start-up or an established OEM, Seaway can mold to your needs.

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POST MOLDING OPERATIONS

Post Molding Operations

Seaway Plastics offers extensive post molding operations including but not limited to heat staking, sonic welding, CNC machining, painting and shielding, assembly, packaging and shipping. Offering these services enables us to give our customers fast and flexible service.

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INDUSTRIES

MEDICAL

AEROSPACE & DEFENSE

Consumer Products

PRECISION INDUSTRIAL

An Outstanding Commitment to Quality

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CASE STUDIES

Medical
Quality Seaway

Plastics for Medical Devices

Defense
Defense Case Study

Major Defense Contractor

The specific defense contractor discussed in this case study has been an integral provider of premium products to defense companies nationally and internationally since its inception in 1969. With over…

Aerospace
Case Study Aerospace Enginerring Company Objective

Aerospace Engineering Company

Since 1998, this aerospace company has created airplane parts integral to developing a professional and safe interior for global air travelers. Their desire to seek new technologies and design solutions…

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ABOUT SEAWAY

At Seaway Plastics Engineering, we operate as a single, integrated manufacturing partner aligned around our customers’ success. We provide precision injection molding and complex assemblies for regulated industries, guided by engineering excellence, quality, and disciplined execution. Across every facility, we deliver consistent performance through strong technical capability, responsiveness, and accountability.

Rapid Tooling

Mantle's Automated Toolmaking System

Seaway has invested in Mantle's innovative Automated Toolmaking System to rapidly produce mold cores and cavities. The system combines CNC machining, 3D printing, and industry-standard tool steels to produce tooling components with the surface finish, accuracy, and steel properties required to make the world's best products. Click to download brochure.

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Mantle P200 Render

WE’RE HERE FOR YOU

No matter what stage you’re in, we’ll guide you through the entire process.

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Seaway Company Profile

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