What Seaway Plastics Engineering does

Seaway Plastics Engineering is a precision plastic injection molding and contract manufacturer founded in 1984 and headquartered in Port Richey, Florida. The company operates five US facilities across Florida, California, and Minnesota totaling over 240,000 square feet, including more than 35,000 square feet of ISO Class 7 and Class 8 cleanrooms. Its core services span in-house mold design and tooling (200+ molds per year), plastic injection molding across 700+ thermoplastic and LSR resins, cleanroom molding and assembly, low-to-mid volume production runs (100-10,000 pieces), and extensive post-molding operations including heat staking, sonic welding, CNC machining, EMI/RFI shielding, painting, and turnkey assembly. Specialized capabilities include two-shot and vertical injection molding, PEEK processing, and the Mantle Automated Toolmaking System for rapid tooling.

The company serves highly regulated industries, with medical device OEMs as its primary vertical and aerospace/defense, consumer products, and precision industrial as secondary segments. It maintains ISO 13485 across all facilities, plus ISO 9001, NADCAP, ITAR registration, and FDA 21 CFR Part 820 registration, positioning it as a single-source manufacturing partner for customers requiring validated, audited production. Named customers include Boeing, Airbus, Qantas, a major defense contractor, and several large medical technology and healthcare companies with multi-year programs.

Seaway generates revenue through project-based contract manufacturing with quote-based pricing tied to part complexity, volume, material selection, and certification requirements. It distributes through a dedicated enterprise field sales motion targeting regulated OEMs, supplemented by a self-serve website quote channel for mid-market prospects. Growth has come from a combination of organic capability expansion and two strategic acquisitions—Wright Engineered Plastics (California, 2020) and MME Group (Minnesota, September 2022)—which broadened its geographic footprint and added specialized two-shot and cleanroom capabilities. The company remains privately held with no disclosed institutional ownership.

Name

Seaway Plastics Engineering

Legal name

Seaway Plastics Engineering

Website

https://seawayplastics.com

Company type

Private

Founded year

1984

Operating status

Operating

Headcount range

101–250 employees

Short description

Seaway Plastics Engineering is a precision plastic injection molding and contract manufacturer serving medical device, aerospace, defense, and industrial OEMs across five US facilities with ISO 13485-certified cleanroom molding, in-house tooling, and turnkey assembly.

Ownership category

akta.pro rank

Headquarters

HQ city

Port Richey

HQ country

United States

HQ region

North America

Offices4 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Personnel, Operations, Supply Chain, Infrastructure, Technology or R&D, Marketing or Sales

Revenue model

1. Contract Manufacturing - Injection Molding Services: Precision injection molding and contract manufacturing services for regulated industries including medical, aerospace, and defense. Revenue is generated through project-based manufacturing contracts with tiered pricing based on volume, material complexity, and value-added services. Services include tooling design/manufacturing, plastic injection molding, LSR molding, cleanroom molding, post-molding operations, and turnkey assembly.
2. Tooling Design and Manufacturing: In-house mold design and manufacturing services producing over 200 molds per year. Includes rapid tooling, aluminum molds, steel molds, and tooling transfers from other facilities.

Pricing tiers

Go-to-market motion1 record

Distribution channels3 records

Marketing channels7 records

Core offering

Seaway Plastics Engineering is a precision plastic injection molding and contract manufacturer serving medical device, aerospace, defense, consumer products, and precision industrial OEMs. The company provides turnkey services spanning in-house mold design and tooling, plastic and LSR injection molding, cleanroom molding and assembly, low-to-mid volume production, and post-molding operations across five US facilities in Florida, California, and Minnesota.

Product overview

Seaway Plastics Engineering is a precision injection molding and contract manufacturing services company operating as a single integrated manufacturing partner. The company offers a comprehensive portfolio of services including mold designing and tooling (in-house and offshore), plastic injection molding (thermoplastic and LSR), cleanroom injection molding and assembly, low-to-mid volume injection molding, and post-molding operations. The portfolio is organized across three main divisions: the core Seaway Plastics Engineering brand (Port Richey, FL and Brooksville, FL), Wright Engineered Plastics (Santa Rosa, CA) offering vertical and two-shot injection molding with cleanroom capabilities, and MME Group (St. Paul, MN) providing additional two-shot molding and cleanroom services. Additional specialized offerings include PEEK injection molding, EMI/RFI shielding, rapid tooling via Mantle's Automated Toolmaking System, and tool transfer services. The company serves highly regulated industries including medical devices, aerospace, defense, consumer products, and precision industrial sectors.

Differentiator

Problem solved

Functional benefit

Brands

• Wright Engineered Plastics: A division of Seaway Plastics Engineering located in Santa Rosa, California, providing custom plastic injection molding and assembly services with clean room capabilities for medical and regulated industries.
• MME Group

Products and services

• Mold Designing & Tooling In-house tooling service building all-aluminum molds, aluminum-and-steel combinations, or all-steel molds from Class 105 to Class 101, with design-for-manufacturability support and over 200 new mold builds per year.
• Plastic Injection Molding
• Cleanroom Injection Molding & Assembly
• Low-to-Mid Volume Injection Molding
• Post Molding Operations
• Two-Shot Injection Molding
• Vertical Injection Molding
• PEEK Injection Molding
• Liquid Silicone Rubber (LSR) Injection Molding
• EMI/RFI Shielding Services
• Tool Transfer Services

Quantifiable outcome

• 40% reduction in lead times for reshored medical device manufacturing projects vs. offshore suppliers
• +6 more outcomes

Named customers7 records

Segments4 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature7 records

Partnerships

Five partnerships are on record, tiered core and supporting.

• MME GroupcoreStrategic or Co-development Partner · 30 September 2022Seaway acquired MME Group, a Minnesota-based contract manufacturer. The transaction enables the combined company to have over 240,000 square feet of manufacturing space across five facilities. This acquisition is part of Seaway's strategy to grow organically and through future acquisitions in the medical device and regulated industries.
• MantlecoreTechnology or IntegrationSeaway invested in Mantle's Automated Toolmaking System for rapid production of mold cores and cavities. The system combines CNC machining, 3D printing, and industry-standard tool steels to produce tooling components with required surface finish, accuracy, and steel properties. This enables faster turnaround for prototyping and bridge production.
• Wright Engineered PlasticscoreStrategic or Co-development PartnerSeaway acquired Wright Engineered Plastics, a Santa Rosa, CA-based provider of custom plastic injection molding and assembly services. Wright brings 21 injection molding machines, 450-ton two-shot machine for overmolding, clean rooms, and extensive overmolding experience. The acquisition expanded Seaway's geographic reach to the West Coast and increased medical industry customer base.
• Three China Mold-Making FacilitiessupportingTechnology or IntegrationSeaway has partnerships with three facilities in China for mold making, in addition to their domestic in-house tool shop. This provides customers with options for cost-effective tooling while domestic capabilities offer quicker turnaround.
• ArburgsupportingTechnology or IntegrationWright Engineered Plastics utilizes Arburg injection molding equipment, including a brand-new Arburg vertical press with vision systems (cameras, laser detectors, limit switches) for quality control during injection molding processes.

Scale indicators13 records

Recent moves8 records

Expansion highlights6 records

Direct peers

• Tessy Plastics: Custom injection molder and contract manufacturer with strong medical device, consumer, and industrial focus. Operates Class 8 cleanrooms and complex multi-shot molding, directly comparable to Seaway's regulated-industry manufacturing model.
• Plastic Components Inc. Custom injection molder serving medical, industrial, and consumer markets with in-house tooling and cleanroom capabilities. Comparable mid-market competitor in the precision contract injection molding space.
• Molded Devices Inc. Custom injection molder specializing in small-to-medium precision plastic parts for medical, aerospace, and industrial customers. Comparable mid-sized competitor offering in-house tooling, molding, and assembly services.
• Donatelle Plastics: Medical and regulated-industry injection molding contract manufacturer with in-house tooling, cleanroom molding, and assembly capabilities. Comparable mid-sized competitor serving medical device OEMs with similar single-source value proposition.
• MedPlast (Vesta): Medical device contract manufacturer specializing in precision injection molding, LSR molding, and cleanroom assembly for Class II/III medical devices. Similar focus on regulated end markets and turnkey single-source manufacturing model.
• GW Plastics: Precision injection molder with deep medical device and automotive exposure, including Class 7/8 cleanroom molding, two-shot capabilities, and tooling services. Operates multiple US and international facilities and competes for the same regulated-industry OEM contracts as Seaway.
• Spectrum Plastics Group: Precision plastic and polymer solutions provider specializing in medical, aerospace, and industrial markets. Operates cleanroom molding, extrusion, and assembly comparable to Seaway's core offerings, with similar focus on regulated end markets and single-source contract manufacturing positioning.
• Tegra Medical: Medical device contract manufacturer offering precision injection molding, insert molding, and cleanroom assembly for Class II and Class III medical devices. Directly comparable to Seaway's medical device manufacturing capabilities and customer segment.

Broad incumbents

• Integer Holdings: Large medical device outsource manufacturer offering injection molding, assembly, and finished device manufacturing for cardio, vascular, and advanced surgical markets. Much larger scale than Seaway and broader portfolio, but directly overlapping in medical injection molding.
• Phillips-Medisize: Global medical device contract manufacturer (Molex-owned) offering drug delivery, diagnostics, and medical device injection molding at substantially larger scale than Seaway. Overlaps in regulated medical contract manufacturing but operates as a broad incumbent with global footprint.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat6 records

Key risks7 records

Key highlights7 records

Customer concentration

• Xx.com/seawayplastics
• Facebookfacebook.com/seawayplastics

Compliance7 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles3 records

Subsidiaries2 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A2 records

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Seaway Plastics Engineering