[Deck Guy]

I think you misunderstand the chemistry of it James (basically have it backwards), but let's hope Russel chimes in, since he can explain the chemistry way better than I ever could. Maybe we both could learn a thing or two from him.

I don't see anything about higher resin content, just higher pigment content (transoxides) than other paraffinic oils. Are you maybe thinking about Wood-Tux??

Anyway, where resins do exist, wouldn't that be what bonds the pigments to the surface? If so, they wouldn't be "fillers," and would likely comprise the most costly ingredient (by a given volume) of a stain formula. It would then be silly to add them as "fillers."

As far as who it benefits...every product offers a compromise between ease of application, cost, and longevity. If only someone could make a stain that was easy to apply, cost $5 a gallon, and lasted 10 years, we'd all be beating a path to his door! As for me, ease of application is a factor I consider heavily.