Can TotalBoat Halcyon be applied over TotalBoat Wood Sealer? Eric Boudreau April 26, 2021 19:41 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 I apply TotalBoat Halcyon over an oil-based stain? Can epoxy be applied over cured shellac? Is TotalBoat Halcyon a water-based polyurethane? Can TotalBoat Halcyon be applied over linseed oil or tung oil? Can TotalBoat Halcyon be applied over shellac? Comments 0 comments Please sign in to leave a comment.