I use various normal tyres on stans rims, or on mavic rims with a rim strip so I am sure it would work on an 819 rim. I find there is normally a couple of days of slight air loss as the side walls get sealed by the sealant then all is fine. and it saves loads of money and weight over proper UST
I’ve used bonty big earl 2.3, they worked very well. highroller 2.1, 2.3 single and double ply, wire and folding, all were ok. Minion non UST also fine. Only problem I had were with maxxis exception series but that is because I kept tearing the light sidewalls.