How to Clean Polyurethane Off Stone Pavers

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Stone pavers, though durable in all types of weather, are still subject to some discoloration when exposed to the elements for a long period of time. To protect the stones, you can apply a layer of polyurethane sealant. The sealant acts to prevent moisture, dirt, oil or any other contaminant from reaching the stone's surface and causing a stain. The polyurethane layer can wear from normal use, however, with some areas of the pavers exposed while others remain protected under the thinning seal. Cleaning off the polyurethane using an environmentally friendly paint stripper can serve as the first step to resealing the stones. Removing the existing polyurethane creates a clean surface on which you can apply the new sealant, protecting the stone surfaces for a few years more.

Things You'll Need

  • Soy-based paint stripper
  • 3-inch natural bristle paintbrush
  • Bed sheets
  • Water hose
  • Brush the paint stripper gel onto the stone pavers using a three-inch natural bristle paintbrush. Apply an even coating of the gel, covering the entire surface of the pavers, as well as along the sides of the pavers where the polyurethane sealant may have seeped.

  • Cover the stripper-covered pavers with a damp bed sheet to keep the stripper from drying out as it works on the tough polyurethane coating. Allow the stripper to sit on the paver surface for the amount of time suggested by the stripper manufacturer.

  • Remove the bed sheet by pressing firmly on the sheet's surface as you scrub off the sealant along with the stripper gel.

  • Wash off the stripped pavers with a water hose to remove any of the paint stripper residue. Wait an hour for the pavers to dry and then inspect the paver surface to determine if any sealant remains.

  • Repeat the removal process if the stripper application fails to remove all traces of the sealant. Use a fresh damp bed sheet with each application to prevent transferring already removed sealant from the used sheet to the pavers.

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References

  • Photo Credit Perry Mastrovito/Creatas/Getty Images
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