I have just been given several tree 'cookies' (cross sections of trunk or branches) that my wife wants to use in her crafts. These include some of ash and birch, several around 3" diameter and a few larger ones maybe 10" diameter. I'm worried that these will crack/split like the Liberty Bell as the wood dries out. (I've seen that in the past with other tree cookies, although not of these two hardwoods.)
Is there something I can use to "fix" these tree slices so that they won't split?