Concrete: .4 water .6 concrete

clay: not sure

Plaster: 1 part water 2 parts plaster

Epoxy: 1:1

Bio-plastic: 10ml water, .5-1.5g glycerine, 1.5g corn starch, 1ml white vinegar. 

Mycelium is very complicated, I haven't found a consistent ratio, but it does say to keep space very clean to not have mold.