Can TotalBoat Halcyon be applied over TotalBoat Wood Sealer? Eric Boudreau October 12, 2020 12:50 Updated TotalBoat Halcyon can be applied directly over TotalBoat Wood Sealer only if the Wood Sealer has completely cured for 48 hours under normal cure conditions, and has been sanded with 320-grit sandpaper, in the direction of the grain. Related articles Can TotalBoat Halcyon be applied over linseed oil or tung oil? Can TotalBoat Halcyon be applied over shellac? Do I just use TotalBoat Halcyon Satin varnish as a final coat, or can I build coats with it, too? Why does my varnish have a lot of bubbles after it cures? What should I expect for varnish coverage? Comments 0 comments Please sign in to leave a comment.