Does Vicks VapoRub act as a barrier to Wudu' (ablution) if it dries on the limb?

Most likely, the aforementioned medicine does not prevent water from reaching the body, nor does it affect the validity of ritual purity (tahara). However, if it has a physical mass (jirm), it must be removed before ablution (wudu'), because it is a condition for the validity of wudu' to remove anything that prevents water from reaching the limb. It is mentioned in "Al-Taj wal-Iklil" that thick, solid oils must be removed, unlike those that are not. Al-Nawawi mentioned in "Al-Majmu'" that the trace of henna or a fluid oil that does not prevent water from making contact does not invalidate ritual purity.