The only way mask will help a non symptomatic infected individual to protect others Is if you are sneezing or coughing.
As for hand sanitiser, if you have a small spray bottle or a small foaming bottle and you are in my area (unlikely I know) I can provide refills for both kinds of sanitiser. One is alcohol based (I have a good supply for woodworking) the other contains no alcohol. I probably have sufficient base material to make 5 litres of alcohol based and much more of the non alcohol based foaming one.
The sanitiser is simple to make if you have the ingredients and I got a delivery from Lazada yesterday. I do not have spare bottles as my order from China was refunded. I may be getting some from Bangkok.