Burls or burrs are usually turned wet as there is not a lot of movment in the wood when it is wet, if you want to cut thin strips why don't you cut 2 or 3 off and put them to one side to dry, you can get proper wood sealer for this and I normally coat the whole of the wood, make sure you have space all between each piece of wood when drying, it would dry whith in a couple of months being thin say 1/4", keep it in an airy place, drying it in one solid piece would take a couple of years
Jimbo