Thank you for the support, you rock! The contractor used one coat of Bona IntenseSeal (I misspelled it) and two coats of Bona Traffic HD (he showed me an empty HD bottle). The contractor said that he forgot to add the HD at the end when he was communicating because these are very similar. In the other hand, the floors looks amazing, you can't even feel the grain of the wood or identify the different types of wood (Maple, pine, oak) easily.

G&S, you said that a sealer would keep the floors light. That's what we are looking for. My guy now said he would do 2 coats of bona natural seal then 2 of traffic hd to avoid streaks from a single coat of sealer. Should that do the trick? I guess if someone said here is a picture of bona naturale and traffic hd I might opt in, but its hard to know.

I am a DIYer who has used Natural Seal. It does not go down easily, and the installer should have familiarity with it before applying it on a paid job. It has a white pigment to lighten the wood in it that you can't see until it dries so careful application is critical. These are "lap marks," where his roller strokes overlapped with previous strokes, resulting in a double application of the pigmented primer in those places. You have two options: 1) Try to get your money back and find someone who knows how to use this product to do it right 2) Have your installer start over and use Bona Classic Seal. It doesn't have any pigment, so you won't run into this problem. Trade-off is that it won't lighten your floors like the Natural Seal, but it also won't darken them like oil-based poly either.

Sorry, just saw this. I feel two coats of finish is sufficient when applied over sealer at the prescribed rate. This is especially true for Traffic which goes on heavier (350-400 sq. ft/gallon for Traffic, 500-600 for Mega). More coats of finish make the floor smoother, filling in the grain, and making wear and scratches more evident. If you're in a situation where you need more longevity, you can have more coats applied and live with the consequences. In most residential situations my customers want their floor recoated when it looks bad due to wear and scratches, not when the finish wears through. The surface accumulates the same amount of wear and scratches whether it has 2 coats or 20 coats, at which point it will look a bit shabby and require a recoat.