Is TotalBoat Halcyon a water-based polyurethane? Eric Boudreau April 26, 2021 19:29 Updated TotalBoat Halcyon varnish is a water-based polyurethane coating which was designed for superior performance, making it suitable for marine applications. Related articles Which varnish should I use? Can I apply TotalBoat Halcyon over an oil-based stain? Will TotalBoat TotalStrip remove TotalBoat Halcyon? Can TotalBoat Halcyon be applied over TotalBoat Wood Sealer? Can TotalBoat Halcyon be applied over linseed oil or tung oil? Comments 1 comment Sort by Date Votes Jperry1202 October 13, 2021 15:23 Product question I would like to refinish my rocket launcher without completely removing all of the current finish. Of course I have no idea what the current finish is. I believe that rocket launcher it’s a release marine product. Please recommend which of your products would be best. 0 Please sign in to leave a comment.