M21-18-499 is a thermal transfer and dot matrix printable nylon cloth label designed for wiremarking and general labeling applications. It features a polyamide coated nylon cloth construction with a matte white finish and permanent acrylic adhesive. The label has a total thickness of 0.0065 inch (0.166 mm) and offers strong adhesion to stainless steel (80 oz/inch after 24-hour dwell), textured ABS, and polypropylene surfaces. It provides reliable performance across a wide temperature range from -40°F (-40°C) to 293°F (145°C) short-term, with excellent humidity and UV light resistance. This halogen-free label material is UL Recognized and CSA Accepted, making it suitable for industrial wiremarking applications where compliance and durability are essential.