An optical scanning system and method for laser engraving a plurality of data subrasters into a substrate to form a raster of engraved data defining an image on the substrate. The tri-block copolymer comprises an aromatic monomer, an olefin monomer, and a alkyl acrylate monomer. A percentage of the group and a distance threshold from a target device are defined. The modular sealing element and integral sealing element are removable to thereby adapt the seal to conduits of different size.