UL recognized, CSA approved, AGA approved, Halogen-Free (DIN VDE 0472/parts 815) Permanent acrylic adhesive. After process: yes, this material will work with this application. This material does not work with surface mount technology. Through hole technology: yes for top. In extreme high temperatures, testing of this material is recommended, no for bottom. Applications are electronic PCB and component identification, bar code label and rating plates and solar panel identification. Thermal transfer print technology. Recommended ribbons are Brady series R6000, Brady series R6000HF (low halogen), Brady series R4400 (colors - red, blue, green, white), Brady series R4900 and R6200 (alternates). B-423 is a UL recognized component to UL969 labeling and marking standard when printed with Brady series R6000 and R6000HF ribbons. The Brady Series R4900 ribbon is also UL approved. B-423 is CSA accepted to C22.2 No.0.15-95 adhesive labels standard when printed with Brady series R6000 ribbon. DIN VDE 0472 Part 815: Brady B-423 meets requirements of a halogen-free material per DIN VDE 0472 part 815. (Statement based on review of product construction and confirmation halogen content test run at an independent test laboratory.) Brady B-423 is RoHS compliant to 2005/618/EC MCV amendment to RoHS Directive 2002/95/EC. Maximum characters per line for font no. 2: 37. Maximum lines of text for font no. 2: 5.