SG guys number one concern when it comes to hair product - easy to wash out. Blackship though water based but will still need conditioner to take it out fully. But its not the worst, a tip is to look at the first few ingredients of the product.
Example blumaan cavalier has the following ingredients:
paraffinum liquidum, beeswax, ricinus communis (castor) seed oil, bentonite, hydrogenated castor oil, VP/VA copolymer (firming agent), water (aqua), kaolin ... etc
First ingredient is paraffinum liquidum, a very refined mineral oil. This is an oil based clay for sure and it will take some hard scrubbing even with soap to get it off your hair AND hands. Same for lockharts and baxter clay. very good hold but trade off is hard to wash off.