How to seal wallpaper seams

Updated February 21, 2017

Loose wallpaper seams can lead to damaged wallpaper if left unresolved. Seams pull apart over time as the wallpaper glue ages. The seam can be repaired by the do-it-yourself homeowner using a seam sealer. The seam sealer will adhere the loosened seams to the wall like new. As soon as you notice a loosening seam, it is important to repair it to avoid tears in the wallpaper.

Identify the seams in your wallpaper that require repair. Apply seam sealer to a small poly brush. Lift the seam slightly open and brush a thin coating of sealer onto the wall underneath the lifted wallpaper.

Press the wallpaper back into place and run over the seam with your hand to smooth it out.

Roll over the seam with a wallpaper roller to ensure that it is completely adhered to the wall.

Wipe the outside of the seam with a damp sponge to remove any excess seam sealer that may have seeped out of the seam.


Look over your wallpaper on occasion to identify seams that are loose and make the repair as soon as possible.


Follow safety precautions on the seam sealant tube carefully.

Things You'll Need

  • Tube, seam sealer
  • Small poly brush
  • Wallpaper roller
  • Damp sponge
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About the Author

Jonah Morrissey has been writing for print and online publications since 2000. He began his career as a staff reporter/photographer for a weekly newspaper in upstate New York. Morrissey specializes in topics related to home-and-garden projects, green living and small business. He graduated from Saint Michael's College, earning a B.A. in political science with a minor in journalism and mass communications.