just how it sounds, but you have to have heat as well. what I do is put the keif into wax paper, make it as tight as possable. I then take my iron (that is on the steam mode, the water helps the keif not burn) then press the iron onto the wax paper, 2 seconds on, 2 seconds off. do that for about 1 minute on both sides. then just toss it into the freeer to cool off. I usually leave it for a few hours to make sure it's cooled down all the way.