Grout-sealer longevity varies by product, grout type, traffic, cleaning routine and moisture exposure. Use the manufacturer's reapplication guidance for the particular sealer installed rather than relying on a universal replacement interval.
Penetrating and surface sealers wear differently.
Heavy foot traffic wears sealer faster.
Harsh or acidic cleaners break sealer down.
Showers and entries see more moisture.
If water darkens grout quickly, it may be time.
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