What Specialty Plastics does

Specialty Plastics, Inc. is a privately held, full-service custom plastic injection molder founded in 1980 and headquartered at 145 Brown Road, St. Peters, Missouri. The company operates a 35,000+ sq. ft. manufacturing facility equipped with 21-22 state-of-the-art injection molding machines ranging from 35-ton (0.9 oz shot) to 500-ton (68 oz shot) presses, plus blow molding, thermoset molding, insert molding, and over molding capabilities. All injection molding machines are equipped with robotics for automated part removal, and the company runs 24/5 with a stated 2-week standard lead time. Its primary customer verticals are medical instruments and automotive, with additional exposure to healthcare, home appliances, sporting goods, electrical/electronics, and lawn & garden, and its stated core competency is tight-tolerance plastic parts, including engineered and exotic resins that the company claims other plants cannot process.

The company maintains an in-house tooling department with SolidWorks Professional CAD design and MasterCam CAM systems, three Hurco CNC machines and a Charmilles EDM for mold manufacturing, and an optional Chinese tooling facility pathway for cost-sensitive programs. Quality assurance is supported by ISO-9001 certification and an inspection lab equipped with a Mitutoyo optical comparator, a Coordinate Measuring Machine (CMM), Keyence automated inspection, and a BYK color spectrometer. Value-added secondary services include hot stamping, pad printing, laser printing, sonic welding, milling, drilling, assembly, and special packaging, and the company offers in-house 3D printing for prototyping, including free prototype samples on selected projects. The company maintains a machine replacement program that retires presses after five years.

Revenue is generated through quote-based, custom-job sales with no public pricing, primarily via direct sales (website quote forms, email, and phone) supplemented by an actively expanding independent sales representative channel for new geographic markets. The company has no disclosed institutional funding, no parent company, no subsidiaries, and no documented M&A or leadership transitions, and it appears to be independently owned. Operating geography is concentrated in the Midwest United States, with shipping programs (including daily kanban delivery to local customers) supporting just-in-time inventory practices.

Name

Specialty Plastics

Legal name

Specialty Plastics, Inc.

Website

https://specialtyplasticsonline.com

Company type

Private

Founded year

1980

Operating status

Operating

Headcount range

11–50 employees

Short description

Specialty Plastics is a privately held, custom plastic injection molder founded in 1980 in St. Peters, Missouri, operating 21-22 presses across 35,000+ sq. ft. to produce tight-tolerance plastic parts for medical, automotive, healthcare, and industrial OEMs.

Ownership category

akta.pro rank

Product category

Custom Plastic Injection Molding

NAICS

All Other Plastics Product Manufacturing (326199), Plastics Product Manufacturing (3261)

SIC

Plastics Products, Nec (3089), Miscellaneous Plastics Products (3080)

akta.pro primary industry

Custom Injection Molding & Contract Manufacturing (Job Shops/CMs) (IMANAFAJ)

akta.pro secondary industries

Automotive & Transportation Injection Molded Parts (IMANAFAB), Medical & Life Sciences Injection Molding (Devices, Diagnostics, Cleanroom) (IMANAFAC)

Keywords

• Plastic injection molding
• Custom plastic manufacturing
• Blow molding services
• Mold tooling design
• Secondary plastic operations

Headquarters

HQ city

Saint Peters

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Custom Injection Molding Services: Core revenue stream from custom plastic injection molding services. Parts range from 35 ton press (3 oz. shots) to 500 ton press (68 oz. shots). Includes thermoset molding, insert molding, and over molding capabilities.
2. Blow Molding Services: Blow molding services for bellows designs, plastic bottles, and other blow molded applications using Polypropylene, Polyethylene, and Polyurethane materials.
3. Value Added/Secondary Operations: Secondary processes including hot stamping, pad printing, laser printing, sonic welding, milling, drilling, assembly work, and special packaging performed in-house.
4. Tooling Design and Manufacturing: In-house mold design, building, and repair services. Also offers Chinese tooling facility option for cost savings with subsequent shipping to St. Peters for production.

Pricing tiers

Go-to-market motion2 records

Distribution channels3 records

Marketing channels4 records

Core offering

Specialty Plastics is a custom plastic injection molder that designs, builds, and runs molds to produce tight-tolerance plastic parts for business customers. Its core offering is custom injection molding across 35-ton to 500-ton presses using Toyo Plastar and Haitian machines, supplemented by in-house tooling, blow molding, 3D prototyping, value-added secondary operations, and ISO-9001 certified quality inspection.

Product overview

Specialty Plastics is a custom plastic injection molder offering a comprehensive portfolio of manufacturing services centered on tight tolerance plastic parts. The core offerings include injection molding (with 22 machines from 35-500 ton capacity) and blow molding services. These are supported by in-house tooling capabilities for mold design, manufacturing, and repair, plus value-added secondary processes (hot stamping, pad printing, sonic welding, assembly). The company also provides 3D printing/prototyping services for design validation and ISO-9001 certified quality assurance with advanced inspection equipment. All services are delivered from the St. Peters, Missouri facility with a focus on serving automotive, medical instruments, healthcare, electronics, sporting goods, and home appliance industries.

Differentiator

Problem solved

Functional benefit

Products and services

• Injection Molding Custom plastic injection molding service for business customers, using 22 state-of-the-art machines ranging from 35-ton (0.9-3 oz shot) to 500-ton (68 oz shot) presses. Capabilities include standard injection molding, thermoset molding, insert molding, and over molding, with all machines equipped with robotics for automated part removal.
• Blow Molding Blow molding services for bellows designs, plastic bottle designs, and other blow molded plastic part applications. Processes polypropylene, polyethylene, and polyurethane materials with PLC controls for high-quality repeatable parts, with optional secondary operations including trimming, cutting, inserts, and leak testing.
• Tooling In-house mold design, manufacturing, and repair service using Solidworks Professional for CAD and MasterCam for CAM. Provides consultation through all Design Control phases from concept to production, with imports accepted in multiple file formats (.sldprt, .prt, .igs, .dwg, .x_t, .step, .sat, .dxf). Also offers the option of molds produced at a Chinese tooling facility for cost savings, with parts subsequently produced in St. Peters, Missouri.
• Value Added Services In-house secondary processes complementing molded parts, including hot stamping, pad printing, laser printing, sonic welding, milling, drilling, assembly work, and special packaging, performed to customer specifications.
• 3D Printing / Prototyping In-house 3D printing service for prototype development using state-of-the-art technology, producing high-quality prototype parts in just a few days to support customers from design concept through production manufacturing. Free prototype samples are offered on qualified projects.
• Quality Assurance ISO-9001 certified quality inspection and testing service for plastic manufactured parts, using Mitutoyo optical comparator, Coordinate Measuring Machine (CMM) with CAD capabilities, Keyence automated inspection, BYK color spectrometer, and a full line of precision measurement gages. Services include capability studies, advanced leak testing, and custom gauging.

Quantifiable outcome

• Standard 2-week lead time commitment
• +2 more outcomes

Segments7 records

Ideal customer profiles7 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature6 records

Scale indicators7 records

Recent moves5 records

Expansion highlights4 records

Direct peers

• Mack Molding: Custom plastic injection molder with in-house tooling, molding, and assembly serving medical, industrial, and consumer customers; closely matches Specialty Plastics' full-service tool-to-finish offering and regulated-industry focus.
• Xometry: On-demand manufacturing marketplace that includes custom plastic injection molding among its instant-quoting services; competes with Specialty Plastics for the same custom molded parts customers, particularly for low-to-mid volume runs.
• EVCO Plastics: Custom injection molder headquartered in the Midwest serving medical, industrial, and consumer products with multi-shift operations and tooling services; a closely comparable regional competitor to Specialty Plastics in size, vertical mix, and capabilities.
• Protolabs: Digital-first custom injection molding service bureau offering quick-turn prototyping and low-volume production globally; directly competes with Specialty Plastics in custom injection molding for industrial customers using automated quoting and manufacturing.
• Plastic Components Inc. U.S. custom injection molder serving automotive, industrial, and consumer markets with engineered resin capabilities and in-house tooling; comparable in vertical mix and mid-market target customers.
• RCO Engineering: Michigan-based custom injection molder serving automotive, medical, and consumer markets with full-service capabilities including tooling and assembly; directly comparable in size, customer verticals, and full-service approach.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights6 records

Customer concentration

• LinkedInlinkedin.com/company/specialty-plastics-inc-

Compliance2 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

Funding overview

Funding rounds

Investors

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

M&A

Investments

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

Frequently asked questions about Specialty Plastics