Brady Authentic M21-500-423 Harsh Environment Polyester Label for Barcode, Solar Panel & PCB Labeling | Black on White

Overview

Brady Authentic M21-500-423 is a durable polyester label designed to meet the demands of harsh environments. It supports barcode, solar panel, and printed circuit board labeling with a high-tack adhesive and a resilient face stock, delivering clear identification across challenging surfaces and outdoor conditions.

Key strengths

• Harsh Environment – high-tack permanent adhesive that sticks to a variety of surface types in all-weather conditions.
• Engineered performance – resists UV exposure, extreme temperatures, abrasions, fuels and oils, degreasers, cleaners, and detergents.

These properties help ensure legibility and durability where labeling is essential for workflow visibility and asset tracking. The label’s black on white contrast is designed to support quick recognition by scanners and operators alike. For material-specific performance and properties, please refer to the Technical Data Sheet (TDS).

Certifications and compatibility

• UL Recognized to UL969
• CSA compliance to C22.2 No. 0.15-95
• RoHS compliant to 2011/65/EU (Pass 2015/863)
• DIN VDE 0472 Part 815

Designed to be used with Brady labeling systems including M210, M210-LAB, M211, BMP21-PLUS and BMP21-LAB, this label adapts to common industrial and renewable energy labeling workflows. While it is built for demanding environments, users should consult the TDS for exact material properties and installation guidelines to match their specific use case.

Ideal uses and scenarios

• Outdoor renewable energy installations where exposure to sun, wind, and moisture occurs.
• Electronic assemblies and control panels requiring durable, legible labeling through routine cleaning and solvent exposure.
• Asset tracking in industrial facilities where labels must endure abrasion and challenging substrates such as metal, plastic, or composite materials.

In practice, you may notice improved label readability under scanning due to the high-contrast black on white face. The product description highlights the main benefits, while the TDS provides deeper technical details to support material-specific decisions.