I think i d layer it in and not fill it up all at once though.
Knot holes in hardwood flooring.
The new stuff just isn t as tight as the older.
But you want a smooth surface.
Wood flour cement or epoxy.
Learn more about filling knot holes in flooring.
Sanding is risky because there s a good chance you ll create a noticeable divot to the outside of your filled knot.
Hickory floors with character knots.
I used a elmers brand hard drying wood filler in natural color let dry 8hrs then sanded fine grit then used a black wood touch up pen to color onto the dried filler.
The solution is to fill the wood knots and voids with epoxy.
You have two strong options.
This matched the hole knot perfectly and is no longer jagged edge that socks swiffer would get caught on.
One will make knot holes disappear the other will highlight the knot while keeping it safely sealed.
I have lots of tiny knot holes in part of my floor where we had to have flooring laid to match the other half of the room when we took down a wall.
It will take a bit of time to dry but if you like the look of the hole go for it.
You wouldn t want to add wood putty because it wouldn t retain the look of the knots.
You could also use a chisel but a plane is better.
Once the epoxy is dry and well filled leveling it out is swift work with a block plane.
The main disadvantage of latex prefinished wood floor filler is that it shrinks and cracks over time so it s not a good option for filling large cracks gaps or knot holes.
It s important to choose a color that matches the color of the stained and finished flooring because latex filler doesn t accept stain itself.