I'm back.
About 10+ years ago I cut two 30" dia. 4" thick slabs of spalted maple. I followed advice and guidelines.
LIghtly coated with poly, then strapped around the wood with metal banding. I put them in a unheated
garage to dry. After two weeks the wood shrank enough that the banding fell off. At about two months,
small cracks began to appear. I drilled 1/4 inch holes through the sides and
glued dowels to try and reduce the splitting. As months passed I drilled more holes.
After 5 years (no moisture guage) I deemed them dry enough. Wanted to use them for table tops.
Used wood filler for the gaps. Within 6 months, the spalted wood had pulled away from the filler enough
that some filler fell out.
I may mess with it again someday.
Thats my story and why I say you cannot stop it from having splits. Reduce them, YES, stop them, NO!
In the picture, the black lines are fissures or cracks.
Larry