Hey. I used 2 parts saw dust to one part sanding sealer. It works just dandy. When I did this before (on wood sub floor)I noticed no buckling,and on my test square2'x2',I haven't noticed any . The test square has been down for about 1 year,but it hasn't recieved the kind of"abuse" that the final floor will(pool table,card games,drunks,etc).Do you have TEC'sphone #,in case I can't find them on the web?