Can TotalBoat Halcyon be applied over Sikkens Cetol? Eric Boudreau April 01, 2022 14:53 Updated TotalBoat Halcyon varnish should not be applied directly over Sikkens Cetol. Cetol should be removed prior to applying Halcyon. Related articles What products can be used as a solvent wipe after sanding TotalBoat Halcyon varnish? How often does TotalBoat Halcyon require maintenance coats for exterior applications? Which varnish should I use? Can a spar varnish be applied over TotalBoat Danish Teak Sealer? Are Cetol and other wood finishes compatible with varnish? Comments 0 comments Please sign in to leave a comment.