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Which sealer suits your floor?
The stain gets the attention. The sealer decides how the floor holds up, how slippery it is wet, and how often anyone has to touch it again.
Stain and sealer are one system
People ask how often a stained floor needs resealing as though the stain set the answer. It does not. The sealer does, along with where the floor is and how hard it gets used. Anyone quoting a universal interval is guessing.