Can someone explain to me what polyurethane is for?(not sure that's what it's called or how it's spelled. sorry)
I stained my living room floor of rough/rustic pine planks with Minwax floor stain. Now the Minwax says it "seals" right on the label. But the guy at the store said that I needed to 'seal' the floor with a polyurethane after staining. So now I am confused. Does the Minwax actual seal the wood? What is the purpose of applying a poly on it.