Distilling this particular mixture might result in 100% ethanol if it is fresh. Depending on how much of the other ingredients are in the denatured alcohol, the 5% left may be entirely exclusive of water. If no water is in that mixture, then 100% ethanol could be distilled from the solution. However, b/c this is not a reagent for chemical use and it has probably been on a shelf for a long time, I'd imagine that at least a little bit of water has made it into the mix.