XTL Permanent Flat Surface Labels are durable and made for a variety of surfaces. Whether you are labeling to OSHA, ISO and ANSI color standards or labeling in harsh conditions, these labels have you covered. Jobsite-tested, UL-recognized labels won't smear or fade. They are ideal for labeling panels, blocks, faceplates, shelves, bins, beams and more. Glossy finish leaves your work looking professional. Black-on-white labels are made of polyester and coated with industrial-grade adhesive.