diff --git a/docs/hermetic.md b/docs/hermetic.md
index f7f4ee8f604..e1e92a4e6ee 100644
--- a/docs/hermetic.md
+++ b/docs/hermetic.md
@@ -9,7 +9,8 @@ A Hermetic Build is a release engineering best practice for increasing the relia
 They are self-contained, and do not depend on anything outside of the build environment.
 This means they do not have network access, and cannot fetch dependencies at runtime.
 
-When hermetic execution mode is enabled, all TaskRun steps will be run without access to a network. 
+When hermetic execution mode is enabled, all TaskRun steps will be run without access to a network.
+_Note: hermetic execution mode does NOT apply to sidecar containers_ 
 
 Hermetic execution mode is currently an alpha experimental feature.