PermaShield™ Laser Printable Labels Blank, printable polyester labels for Laser Printers. Brady's durable PermaShield™ labels are protected by a clear overlaminate film, so they remain clear and easy-to-read, even in harsh environments. Application of these labels is very easy. Simply print the label, then put the label in place and cover with the clear polyester (B-966B) overlaminate. This material is also UL-recognized. See UL file MH17154 for specific details.