"Enamel" is the eighteenth single by Japanese visual kei rock band SID, released on August 27, 2014 by Ki/oon Records.

In May, it was announced that Sid's new song "Enamel" would be used as the opening theme for Kuroshitsuji: Book of Circus.

[2] The B-side of "Enamel" is "Kagee" (影絵) and the third track is a live version of "Monochrome no Kiss", recorded on a tour celebrating Sid's 10th anniversary in 2013.

It ended on July 6 and was a mostly national tour, but featured one performance in Hong Kong and one in Taiwan.

[7] CD Journal website described the single as a "dramatic song enveloped by the diversity of SID".