B-423 Permanent polyester is UL recognized for outdoor use on glass, thermoset polyester plastic and polyvinyl fluoride plastic surfaces to support solar panel identification applications;Recommended ribbons are brady series R6000, R6000HF (low halogen), R4400 (colors - red, blue, green, white), R4900 and R6200 (alternates);Agency approval(s)/compliance are AGA approved, CSA approved, halogen-free (DIN VDE 0472/parts 815), UL recognized;Autoclave, freezer environment with smooth, textured/rough surface;Printer compatibility is BMP21, ID PAL, LABPAL