re: radiant floors and dinning table

Once wood is dry throughout, you shouldn’t have much more warping or cracking, unless a really big change in the environment. Most of the time with big slabs if there is a bunch more warping or cracking it is because it wasn’t dry all the way through, especially if it has been air dried. Generally where I live the average humidity in the summer is between 60-70% and the winter around 15-20%; the moisture content in the wood varies from ~3% in the winter to 9% in the summer.

I use epoxy frequently to seal large cracks in the slabs but I’ve never used it for a thick finish on the top, most of the finish I use is a wiping varnish (easily fixed if scratched or stained).