ISO 13485 Certified Injection Molder

In-House Tooling

Injection Molding - Thermoplastic and LSR

Cleanroom Molding & Assembly

Finishing

OUR SERVICES

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

Plastics for Medical Devices

Defense

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

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…

ABOUT SEAWAY

At Seaway Plastics Engineering, we specialize in plastic injection molding for low to high-volume projects. With over 40 years of experience, we manufacture precision parts and complex assemblies for highly regulated industries, including medical, aerospace, and defense.

As an ISO 13485-certified molder, we offer medical, cleanroom, and industrial injection molding with expertise in over 700 thermoplastics and liquid silicone rubber (LSR). Our full turn-key solutions include DFM, engineering, in-house tool design, injection molding, assembly, kitting, packaging, and distribution. We also provide value-added operations like pad printing, welding, and shielding.

Our vertical integration drives efficiency, cost savings, reduced risk, and faster time to market. With facilities in Port Richey, FL; Brooksville, FL; Santa Rosa, CA; and two in St. Paul, MN, we scale to support complex projects.

With 25,000+ square feet of ISO Class 7 & 8 cleanrooms, we offer FDA-certified molding, assembly, validation, and specialized packaging for advanced medical products.

At Seaway, we bring engineering expertise, world-class technologies, and a commitment to excellence. Let’s build your next injection molding solution.

Port Richey, Florida

Brooksville, Florida

Santa Rosa, California

St. Paul, Minnesota (2)