Your plural component spray equipment is the foundation of your polyurea business. Buy the right system and you’ll have reliable, profitable tool that serves you for years. Buy the wrong system—or the right system without understanding how to maintain it—and you’ll spend your days fighting equipment failures instead of applying coatings. This guide is based on equipment discussions from our certification programs and accumulated wisdom from our applicator community.
How Plural Component Equipment Works
Polyurea requires a heated, metered, and impingement-mixed delivery system. The proportioner (also called a “reactor”) heats both the A-side (isocyanate) and B-side (resin) components to 130–180°F, then delivers them to the spray gun at a precise volumetric ratio—typically 1:1 for most polyurea formulations, though some are 2:1 or other ratios.
At the gun, two pressurized streams impinge against each other in a small mixing chamber, creating the turbulent mixing needed for complete reaction before atomization. This all happens in milliseconds—which is why polyurea gels so quickly after leaving the gun tip. Understanding this process is fundamental to diagnosing problems, which we cover in depth in our Equipment Maintenance & Troubleshooting course.
Key Specifications to Evaluate
Output Capacity (lbs/minute)
Output determines how quickly you can apply material. For bedliner work, 1.5–5 lbs/minute is typical. For large commercial or industrial projects, you may want 15–30 lbs/minute or more. Buying more output capacity than you need costs money upfront; buying too little creates production bottlenecks on larger jobs.
Maximum Working Pressure (psi)
Most polyurea applications require 1,500–2,500 psi at the gun. Higher-viscosity materials or colder components may require higher pressures. Choose a system with a pressure rating that gives you headroom above your expected working pressure—running a pump at maximum pressure accelerates wear.
Heated Hose Length
Heated hoses maintain material temperature between the proportioner and the gun, which is critical for consistent viscosity and reactivity. Standard heated hose sets come in 25-foot increments, up to 300 feet or more for large-scale industrial work. Each additional 50 feet of hose increases heat output requirements and capital cost.
Control System
Modern proportioners offer digital temperature controls, pressure monitoring, ratio checks, and data logging. These features add cost but enable better quality control and faster troubleshooting. For commercial work where you need to document parameters for project specifications, data logging capability is increasingly expected.
Leading Equipment Brands
Graco
Graco is the dominant player in plural component spray equipment. Their Reactor line (E-series for entry-level, H-series for professional, XP-series for heavy industrial) covers the full range of application requirements. Graco’s extensive dealer network, parts availability, and technical support make them the default choice for most new entrants to the industry. The Reactor 2 H-40 is one of the most widely deployed units among Coatings Academy graduates doing commercial work.
Gusmer/Glascraft
Gusmer and Glascraft (now part of the same parent company as Graco) have deep histories in plural component spray equipment for both polyurethane foam and polyurea. Their systems are preferred by some applicators for specific applications, particularly spray foam roofing where their equipment heritage runs deep.
PMC (Polyurethane Machinery Corporation)
PMC manufactures a line of proportioning machines popular in secondary containment and industrial flooring applications. Their Star series offers good performance at competitive price points. PMC has a strong service network in the eastern United States.
New vs. Used Equipment
Used proportioners can represent significant savings—a $40,000 Reactor H-40 might be available used for $18,000–$25,000—but buying used plural component equipment requires thorough inspection. The pump fluid sections, heated hoses, and control boards are the expensive components and the first to wear. Before buying used equipment, have it serviced by an authorized technician and verify all fluid sections, heater elements, pressure transducers, and hose connections. Many of our community members have experience buying and refurbishing used equipment and are happy to share their experience in the member forum.
Gun Selection
The spray gun is where the chemistry happens. The most widely used guns in polyurea applications include the Graco Fusion (air-purge and mechanical-purge versions), the Gusmer/Glascraft GX-7 series, and the PMC DF-series guns. Gun selection affects pattern quality, ease of cleaning, and application rate—all topics we cover hands-on in our workshop sessions.
Ready to invest in the right equipment for your business? Our instructors are happy to discuss equipment recommendations based on your target market, budget, and production goals. Contact us or post your questions in the Coatings Academy member community.
