Five Star Fabricating

Advanced Composites. Polycarbonate Windows. Thermoformed Plastics.

Engineered Manufactured Tested Under One Roof

American-made engineered components built for demanding applications where strength, weight, optical performance, and durability matter.

What We Do

Advanced Composite, Polycarbonate, and Thermoformed Plastic Capabilities

Engineered for OEM applications requiring impact resistance, optical clarity, and long-term durability at scale.

Advanced Composites
Polycarbonate Windows
Thermoformed Plastics
FUSIONITE™ Coatings
CNC Machining
Metal Fabrication
Lab Testing
Proprietary Material Blending
Advanced Composites

Advanced composite structures built for programs where strength, weight, and precision matter. From prepreg layup to autoclave cure — all under one roof.

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  • Carbon fiber, fiberglass, and hybrid laminates
  • Autoclave and out-of-autoclave processing
  • Structural and cosmetic composite components
  • Full material traceability and certification support
Advanced Composites
Optical Performance
Polycarbonate Windows

Custom-formed polycarbonate windows engineered for optical clarity, impact resistance, and long service life across heavy equipment, defense, and transit applications.

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  • Flat, bent, and compound-curved window profiles
  • Hard-coat options for abrasion and UV resistance
  • OEM-spec tolerances for direct drop-in fitment
  • Ballistic and blast-resistant grades available
Polycarbonate Windows
Plastic Forming
Thermoformed Plastics

High-precision thermoforming for complex plastic components across a range of materials. Engineered for tight tolerances, surface quality, and repeatable production.

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  • Vacuum and pressure forming capabilities
  • Wide range of thermoplastic materials
  • Trimming, drilling, and finishing in-house
  • Scalable capacity from program launch to full production
Thermoformed Plastics
Surface Engineering
FUSIONITE™ Hard Coatings

Proprietary FUSIONITE™ hard-coat and optical coatings engineered for abrasion resistance, UV stability, and long-life optical performance on polycarbonate surfaces.

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  • Proprietary FUSIONITE™ hard-coat technology
  • Superior abrasion and UV resistance
  • Applied in-house for full quality control
  • Qualified for aerospace, defense, and motorsports
FUSIONITE Coatings
Precision Manufacturing
CNC Machining

Precision CNC machining for plastics, composites, and metals. Tight tolerances, clean finishes, and fast turnaround for OEM development and production programs.

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  • 3, 4, and 5-axis milling capabilities
  • Plastics, composites, aluminum, and steel
  • Tolerances to ±0.001" on critical features
  • First article inspection and CMM reporting
CNC Machining
Structural Manufacturing
Metal Fabrication

Custom metal fabrication for brackets, frames, enclosures, and structural assemblies. Engineered to spec and built for production-level repeatability.

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  • Laser cutting, bending, and welding
  • Aluminum, steel, and stainless steel
  • Powder coat and anodize finishing available
  • Assembly and integration with plastic components
Metal Fabrication
Quality Assurance
Lab Testing Capabilities

In-house testing and qualification services to verify performance before parts leave the facility. ISO 9001:2015 certified with full documentation and traceability.

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  • Impact, abrasion, and optical clarity testing
  • UV and environmental exposure testing
  • CMM dimensional inspection and reporting
  • ISO 9001:2015 certified quality system
Lab Testing
Industries We Serve

High-Performance Solutions for OEM Production Programs

From early development and prototyping through validation and full-scale manufacturing, Five Star partners with OEMs to bring engineered components to market and keep them in production.

Our focus is long-term manufacturing programs, not standalone, one-off fabrication projects.

Why OEMs Choose Five Star
Five Star polycarbonate manufacturing on the production floor Five Star technician inspecting a performance window
Manufacturing Excellence Since
1978

Proven Performance for Programs That Cannot Fail

Since 1978, Five Star has engineered high-performance polycarbonate and composite capabilities for demanding OEM applications where failure is not an option.

As the only North American manufacturer that forms, coats, and certifies polycarbonate in-house, we deliver unmatched control over performance, quality, and repeatability across your OEM program—from prototype through full-scale production.

  • Single-source forming, coating, and certification
  • 250+ engineers, technicians, and manufacturing specialists
  • 315,000 sq ft advanced manufacturing campus
  • U.S.-based production in Twin Lakes, Wisconsin
Explore Our Capabilities

Our certifications

Certified for high‑performance applications

Our quality system and glazing products meet the standards that automotive, motorsport and rail programs specify.

Member of

SAE International

Association of Equipment Manufacturers (AEM)

  • ISO 9001:2015

    Certified quality management system.

  • ECE R43

    UN regulation for vehicle safety glazing, recognized in Europe and internationally.

  • ANSI Z26.1

    US standard for safety glazing materials in motor vehicles.

  • FRA 49 CFR 238.421

    Federal Railroad Administration glazing requirements for passenger rail equipment.

How We Work

OEM Product Design & Development Process: From Concept to Certified Production

A structured process that reduces risk, accelerates development, and ensures consistent performance at scale. From prototype through full-scale OEM production.

All forming, coating, and certification performed in-house — giving you total control over performance, quality, and repeatability.

Five Star polycarbonate window forming and handling on the production floor
01 Engineering Alignment
We start with your application, constraints, and performance requirements.
02 Material & Process Engineering
Polycarbonate systems, coatings, and forming methods selected for your exact operating environment.
03 Prototype & Validation
Prototype builds, testing, and iteration to validate performance and confirm production readiness before launch.
04 Production & Scale
Full-scale manufacturing with validated quality, repeatability, and certification.
Case Studies

Programs We've Engineered to Perform

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The Schultz family accepting the NASCAR Cup Series Supplier of the Year award for Five Star
Motorsports
NASCAR Cup Series Supplier of the Year
The Challenge

The NASCAR Cup Series required lightweight, impact-resistant polycarbonate body panels capable of withstanding extreme race conditions while meeting its strict technical specifications.

2× Consecutive years named NASCAR Cup Series Supplier of the Year
Van fitted with lightweight Five Star polycarbonate fixed side windows
Automotive
Stellantis Reduces Vehicle Weight with Polycarbonate Windows
The Challenge

Stellantis needed to reduce vehicle weight to improve fuel efficiency and performance. Five Star's lightweight ejection mitigation polycarbonate glazing replaced traditional glass without compromising occupant safety.

Lighter Than traditional glass, with ejection mitigation built in
Wiper test comparison of standard polycarbonate and Fuisonate coated polycarbonate
Coatings
Scratch-Resistant Polycarbonate Windshields
The Challenge

Standard polycarbonate windshields scratch under repeated wiper use, shortening service life and raising costs. Five Star's Fuisonate™ coated polycarbonate was put to the test against standard polycarbonate.

20,000+ Wiper cycles tested with less than 2% haze increase
Who We Are

Inside the Five Star Manufacturing Process

Where tight tolerances, fast timelines, and constant innovation turn our premium materials into race-ready performance. Get a behind-the-scenes look at the all-new Sprint Car Body, the '69 Camaro Pro Mod, Northeast Modified bodies, and more.

Talk to Engineering
Engineering Support

Talk Directly to Our Engineering Team

Our engineers work directly with OEM programs from material selection through full-scale production. No sales intermediary — just engineers solving real application problems.

Ready to discuss your program? Reach our engineering team at +1 (262) 877-2171 or Contact Us

Schedule a Consultation
Resources

Material Selection Resources for Engineers & OEM Programs

OEM engineers complete most of their research before first contact. These guides answer the critical questions around cost, performance, and failure risk.

AGV Protective Covers: Impact and Optical Requirements for Warehouse Robotics

AGV Protective Covers: Impact and Optical Requirements for Warehouse Robotics

How to specify polycarbonate sensor covers for AGVs and AMRs that hold up to warehouse impacts, cleaning chemicals, and LiDAR and camera requirements.

Mining Equipment Cab Windows: Dust, Chemical Exposure, and Impact Ratings

Mining Equipment Cab Windows: Dust, Chemical Exposure, and Impact Ratings

Silica dust, hydraulic fluids, and blasting debris attack mining cab windows at the same time. Here is how coated polycarbonate is specified to handle all…

Polycarbonate Glazing for School Buses: What the Standards Require

Polycarbonate Glazing for School Buses: What the Standards Require

How FMVSS 205 and FMVSS 217 apply to school bus glazing, and where coated polycarbonate fits in side window and emergency exit positions.

Understanding ANSI Z26.1: A Plain-Language Guide for OEM Engineers

Understanding ANSI Z26.1: A Plain-Language Guide for OEM Engineers

A plain-language guide to ANSI Z26.1 for OEM engineers: how the AS items work, which tests matter for polycarbonate, and how to read a certification…

Forestry Equipment Cab Glass Failures Are Preventable: Here Is the Case for Polycarbonate

Forestry Equipment Cab Glass Failures Are Preventable: Here Is the Case for Polycarbonate

Home News & Blogs Forestry Equipment Forestry Equipment Forestry Equipment Cab Glass Failures Are Preventable: Here Is the Case for Polycarbonate Glass fails predictably in…

Vandalism-Resistant Transit Windows: What the Testing Data Actually Shows

Vandalism-Resistant Transit Windows: What the Testing Data Actually Shows

Home News & Blogs Mass Transit Mass Transit Vandalism-Resistant Transit Windows: What the Testing Data Actually Shows Impact, cleaning abrasion, graffiti solvents, and decades of…

Start Your Next OEM Program With Confidence

Work directly with our engineering team to develop high-performance plastic and composite components — from engineering development through full-scale production.

Trusted by OEM programs across EV, heavy equipment, defense, and motorsports.