In my previous life, we never used thread sealant on brass fittings as the material is soft enough that the threads deform creating a seal.

The kitfox manual specifies sealant on the fittings coming from the master cylinder but does not say anything about the brass fittings into the gear legs, calipers, and cylinders. Am I correct to assume that thread sealant is not required due to the fittings being brass?