Now defunct label operating in early-mid 1980s from Berkeley, California, closely affiliated to Systematic Record Distribution and Subterranean Records.

Per Joe Carducci (of Systematic Record Distribution, Optional Music and SST), he started Thermidor with Jon Boshard (an MFA from UCB). Their first release was a Flipper record co-released with Steven Tupper of Subterranean and credited to both labels.

("Systematic had a label but my partner was not easily interested in this or that band so I kicked a few hundred dollars to Steve Tupper and we called the first Flipper 45 a Subterranean-Thermidor co-release.")

Thermidor 3 co-credits World Imitation Records and Thermidor, noting Thermidor as a "service" of Subterranean Records.