makes small dots. Its almost like vermiculite additive that you drop into a gallon of paint and then oly roll it on. This stuff becomes very thick and it has to be stirred all the time so that the particles don't fall to the bottom of the can.
Your coverage per gallon will go from 350 square feet per gallon to about 100 square feet, this is because it become soo thick.
Now, you will need to clean, prime and prep the surface for this application. I would do this if I were you.
Get a quart of white latex interior paint, add the appropriate amount of additive, then get a piece of wall board and test it out. This stuff takes a while to dry, so do follow those instructions.