Sealing question
 

I sealed a couple of plugs a few weekends ago. I sealed them and painted before I epoxied them I stuck them in a bucket of water. No splitting after 2 days. I let them dry out and epoxied them a week later. now some have split:af: . Any clues what I did wrong?

What kind of wood and what kind of sealer did you use?:confused:

Waterlox and hard maple.