I have used flame seal wood sealer and flame retardant with excellent results (it goes on the bare wood but is not a finish), but I am disappointed with the top coat products that are available. does anyone know which finishes are not flammable and do not impart opaque colors to the wood? My deck is redwood and I don't want to mask the grain.
If you are looking for a water based semi-transaprent stain then I would suggest the Defy Stains.