Thanks to 1943Mike for the link! Future is a clear acrylic floor coating. Modelers discovered years ago that it has a place on the workbench. Yours is one case, it can be used to provide a smooth surface over which to apply decals and help eliminate silvering. Silvering comes from air trapped between the decal film and the surface below. A matte surface is rough, which is why it appears matte, it scatters light, instead of reflecting it. The clear acrylic makes a much more smooth surface.
Another service Future provides is in making clear parts appear clearer. It's the same effect as in gloss-coating for decals--the clear acrylic fills in tiny scratches and similar imperfections in the surface of the clear part, and allows better direct transmission of light. Those scratches scatter light and that's way makes the part look cloudy. Airplane canopies or other transparencies, for example. You can also use it to repair a clear part that gets damaged, especially from glue smudges. Simply sand the smudge down with successively finer grits, down to polishing grits, and then dip the piece in Future. It's pretty effective.
It can also be used as an adhesive, especially for clear parts. I also recall someone mentioning that he used clear acrylic to attach photo-etch bits.
Matt Swann, who maintains his website, Swanny's Models, maintains a page with more info about Future, including its history and the various brand name changes it has undergone over the years, and in many different countries:
http://www.swannysmodels.com/TheCompleteFuture.html
Hope that helps!