Kleistwahr has been played on NTS shows including After Dark w/ HELM, with Over Your Heads Forever first played on 25 November 2020.

Kleistwahr is the sophmore project of Gary Mundy, who is most known for operating Broken Flag Records, a Power Electronics and Noise Rock based record label in the UK. He's also more known for his more famous project Ramleh. Kleistwahr was started shortly after the abandonment of Mundy's debut project S.P.I.T.E. after only releasing one cassette. Kleistwahr was started in that same year, 1982, as both the start of Broken Flag's publication and as a solo project. Ramleh was also started that same year, and unlike S.P.I.T.E., Mundy continued to operate Kleistwahr while Ramleh was also active, until it too ceased activities. Mundy explains that his original intention was to "present it as a mysterious German band", but would tell people that it was him if asked directly. He released 4 albums under Kleistwahr until he ceased the project in 1987 to focus on Ramleh. The project was resurrected in 2009 and remains active. Mundy states that he makes an effort to release albums annually. All 80s Kleistwahr albums were re-released on the 2023 compilation CD titled "Don't Let Go", alongside some miscellaneous compilation tracks. Mundy's musical activities as of the time of writing are mostly found on Kleistwahr.