How do I remove dog urine from grout?

Written by catherine hiles
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How do I remove dog urine from grout?
Grout absorbs dog urine if improperly sealed, resulting in odour and discolouration. (Tiled floor image by Simon Amberly from

A tiled floor is a popular choice for dog owners because it is easier to clean and maintain than carpet. Occasionally, your dog might have an accident indoors, causing an unsightly stain and pungent odour. If the dog urinates on the tile, it makes cleanup relatively easy, since the floor can be swept and mopped. Unfortunately, dog urine can sometimes soak into grout on tile floors, sealing the odour and staining the grout yellow. Cleaning is possible, though several attempts might be necessary to completely remove the stain.

Skill level:

Things you need

  • Oxygen bleach
  • Stiff scrubbing brush
  • Cleaning rag
  • Enzymatic pet stain cleaner
  • Grout sealer
  • Paintbrush

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  1. 1

    Mix together 1 quart warm water and 29.6ml oxygen bleach. Pour the solution onto the urine-stained grout and let it sit for 10 to 15 minutes. Scrub the stain with a stiff scrubbing brush to work the solution further into the stain. Rinse with clean water and remove liquid with a rag. Repeat if the stain remains.

  2. 2

    Spray the urine-stained grout with an enzymatic pet stain cleaner, available from most pet stores. Leave the cleaner on the grout for at least five minutes to allow the enzymes time to digest the organic matter contained in the urine. Wipe up with a clean cloth and repeat if the stain remains.

  3. 3

    Seal the grout once the dog urine stain has gone. Apply at least two coats of grout sealer using a paintbrush. The sealer makes any future dog urine bead on the grout rather than soaking in.

Tips and warnings

  • Test an inconspicuous area of grout using your cleaning product of choice before using it on the urine stain. Check for possible discolouration caused by the cleaner before proceeding.

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