Paint Type
Polyurethane Paint
Polyurethane paint uses urethane resin to create a durable coating with resistance to wear, weather, or chemicals. The category includes clear wood finishes, pigmented one-part coatings, and two-part industrial systems, so their approved surfaces, mixing, ventilation, application, and curing requirements are not interchangeable.
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Polyurethane paint compatibility
Choose a product designed for the exact substrate and exposure. Two-part systems must be mixed and applied within their stated working time.
| Surface | Compatibility | Preparation | Primer | Finish | Article |
|---|---|---|---|---|---|
| Wood | Excellent with a wood polyurethane or approved coating system | Remove wax, grease, and loose finish; sand as directed and remove all dust. | Clear wood polyurethane may be applied to bare or stained wood; pigmented systems are product-specific. | Smooth, durable clear or colored finish available in multiple sheens. | — |
| Concrete | Excellent with a concrete or floor-rated urethane system | Allow new concrete to cure, test moisture, and remove laitance, curing compounds, grease, and loose coating. | Use the specified concrete primer or base coat. | Hard-wearing finish with resistance determined by the complete system. | — |
| Steel and metal | Excellent with an industrial or direct-to-metal urethane | Remove rust, mill scale, grease, and loose coating, then create the required surface profile. | Use the specified corrosion-resistant primer unless direct-to-metal application is approved. | Durable topcoat with good color and gloss retention in suitable systems. | — |
| Aluminum | Good when the system expressly approves aluminum | Remove oxidation, clean and degrease, then abrade or pretreat as specified. | Use an aluminum-compatible primer unless the coating is approved for direct application. | Protective finish for interior or exterior exposure as rated. | — |
| Fiberglass | Good with a compatible industrial, marine, or specialty system | Remove wax and contamination, sand as directed, and eliminate all dust before coating. | Use the system's fiberglass-compatible primer when required. | Durable finish whose flexibility and exposure rating depend on the selected formula. | — |
| Drywall | Limited to specialty systems that approve prepared drywall | Repair defects, sand smooth, remove dust, and ensure the wall is clean and dry. | Use the exact primer required by the specialty coating. | Primarily for demanding commercial or industrial environments rather than ordinary walls. | — |
Sources: Sherwin-Williams polyurethane floor coatings, Sherwin-Williams VOC Aliphatic Polyurethane, Rust-Oleum 5800 Water-Based Urethane, PPG AQUATAFLEX coatings, and Behr Water-Based Polyurethane.
Polyurethane paint articles
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