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The RUST-OLEUM 315506 is a 1-gallon, water-based direct-to-metal (DTM) acrylic enamel coating in Silver Gray gloss finish. It is formulated for indoor and outdoor applications and requires no primer before application. The coating delivers excellent corrosion resistance on bare metal and primed surfaces, protecting against mild to moderate environmental exposure. It dries in approximately 15 minutes, making it well suited for commercial maintenance, industrial facilities, and structural steel applications where downtime must be minimized. Licensed painters and facilities maintenance professionals install this product.
This coating is used across a broad range of indoor and outdoor metal surfaces, including structural steel, equipment housings, railings, tanks, and fabricated metal components. It applies with minimal brush drag and lays out evenly when applied by roller, making large surface coverage efficient. It meets USDA requirements for incidental food contact and is accepted for use in federally registered Canadian food facilities, making it appropriate for food processing and food service environments requiring compliant coatings.
Designed for direct-to-metal application on indoor and outdoor bare metal, lightly rusted metal, and previously painted surfaces in mild to moderate exposure environments.
Surface preparation is critical — remove loose rust, grease, and contaminants before application. Apply only when ambient temperature is between 50 and 100 degrees F and relative humidity is below 95 percent. Follow local VOC regulations and applicable safety codes when applying coatings in enclosed or food-adjacent environments. Allow full cure before exposing the coated surface to service conditions.
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