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.


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.


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.


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.


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.




Consumer Products


An Outstanding Commitment to Quality


Defense Case Study

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…

Case Study Aerospace Enginerring Company Objective

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…


Seaway Plastics Engineering along with its two divisions, MME Group and Wright Engineered Plastics, is a contract manufacturer that specializes in plastic injection molding for low to higher volume projects. For more than 40 years, the company has manufactured precision parts and created complex assemblies for customers across a range of highly regulated industries, including the medical, aerospace, defense and precision industrial markets.

Qualified as an ISO 13485 certified injection molder, Seaway provides medical injection molding, cleanroom injection molding and industrial injection molding. The company offers more than 700 industrial and medical-grade thermoplastics and liquid silicone rubber (LSR) to meet the needs of any customer.

Seaway provides a full range of services to ensure end-to-end support for its customers. Full turn-key solutions include design for manufacturing (DFM), engineering, in-house tool design and build, injection molding using thermoplastics and silicone, assembly, kitting, packaging, and distribution. The company also offers an array of value-added secondary operations, such as pad printing, welding, shielding, heat staking, annealing, and much more.

Partnering with Seaway provides cost and time savings and overall efficiency for every project due to their vertical integration. This translates to reduced overall risk and faster time to market.

The company has more than 250,000 square feet of manufacturing space at five facilities across the U.S.:

Port Richey, Florida

Brooksville, Florida

Santa Rosa, California

St. Paul, Minnesota (2)

All five Seaway locations are ISO 13485 certified to ensure the safe, reliable manufacturing and handling of medical devices.

With more than 35,000 square feet of ISO Class 7 & 8 cleanroom space, Seaway provides FDA-certified cleanroom injection molding and assembly. The company is equipped to manage not just the complex molding of individual parts, but any intricate mechanical and electrical assembly, validation and specialized packaging that are required to ensure the integrity of today’s specialized medical and healthcare-related products.

At Seaway, we bring an engineering mindset, world-class technologies and materials, end-to-end support, and a commitment to excellence to everything we do. Let us create customized injection molding solutions to meet your diverse and specialized manufacturing challenges.


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

Subscribe to Our Quarterly Updates

Please enter your name.
Please enter a valid email address.
Something went wrong. Please check your entries and try again.