Water proof end cuts of interior dimensional posts
I have 4x4 and 4x6 posts that support a header over three 42" x 71" pane glass windows. They are exposed to the elements on the outside and are dry walled on the inside. The posts rest on a PT sill plate which sits directly on a slab. I'm about to replace the posts because the bottoms rotted - possibly due to moisture wicking through the sill plate. I plan to include a vapor/moisture barrier under the sill. In addition I want to seal the end cuts to ensure no moisture enters the post. I can't use the outdoor (green liquid which leaves a lingering odor) because of the smell. Any suggestions for a moisture and termite treatment for these semi-interior/exterior posts?