I noticed some time ago, just a few years ago maybe, that my Resolene was not sealing dye.
I think the makers might have changed it at some point
20 years ago when I first used Resolene one coat would seal dye, two coats were good for resist on my game boards. Then, a couple of years ago, I noticed that my newer batch of Resolene wasn't doing the job of sealing red dye no matter how many coats I put on or how it was put on so in desperation to get some 'coffee cup cuffs' sealed I grabbed my local version of 'Mop & Glo' which I'd been using as a varnish on wood, antler handles et cetera and found it worked wonderfully well.
Its now my main 'go to' sealer.
Its also a lot cheaper at £1 for 750 ml of 'Astonish Floor Polish' as it is called compared to £6.70 (+ s&h )for 120ml