Calcium silicate board does not paint it
Oil is not the main paint is that you want to use the board there, indoors and outside there is a difference
Look at how specific you use, do not brush paint is also possible
Mainly to see what you use, if you are inside the wall, then it does not matter, if you are exposed to the external wall, then the second wave of boiling up to the degree of sandal bites the best you give the board to do a layer of water, not just brush paint Yes, the need for waterproof paint or paint
