How to scotchgard a carpet

Updated February 21, 2017

Scotchgard is a substance developed by 3M to protect upholstery and other fabrics from staining. There is also a version of Scotchgard for cleaning stains and getting them out of fabrics. Wall-to-wall carpeting can be frustrating to get clean because you cannot just pull it up and send it to the cleaners. With Scotchgard, you can avoid that frustration and keep your carpet looking as fresh and clean as it was when you installed it.

Measure the carpeted area and buy the Scotchgard. You will need 1/5 litre of Scotchgard for every 53 square feet of carpet. If the carpet is plush, you will need 1/5 litre of Scotchgard for every 26 square feet.

Mix 1 litre of Scotchgard carpet protector for every 4 litres of warm water in a bucket.

Vacuum the carpet and use a carpet cleaner to bring out any spots or stains. You might need to shampoo the spots or high traffic areas to get any staining out. If you do not clean the carpet before you Scotchgard it, you might seal any existing stains in. If the carpet is brand new, skip this step.

Pour the diluted mixture into the spray tank. Seal the spray tank and pressurise it to 22.7 Kilogram per square inch. Once the tank pressure drops to 13.6 Kilogram per square inch, repressurize the tank to 50.

Hold the spray wand 12 inches from the carpet and spray the carpet in overlapping strokes. You want coverage of about 1 litre of the diluted solution for every 53 square feet of carpeting for regular carpet. For plush carpeting, use 1 litre for every 26 square feet.

Rinse out the sprayer and spray wand once you finish spraying.

Wait until the carpet dries before you walk on it. It should take between six and 12 hours. The maximum stain protection takes three or four days to develop after application, so stay off of the carpet as much as possible during that time.


A rotary shampooer works best to get staining out of the carpet, rather than a dry shampoo and vacuum. Many new carpets come from the factory with Scotchgard or another stain resistant treatment pre-applied.

Things You'll Need

  • Scotchgard carpet protector
  • Water
  • Bucket
  • Vacuum
  • Carpet shampoo
  • Carpet shampooer
  • Carpet sprayer
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About the Author

Marissa Robert graduated from Brigham Young University with a degree in English language and literature. She has extensive experience writing marketing campaigns and business handbooks and manuals, as well as doing freelance writing, proofreading and editing. While living in France she translated manuscripts into English. She has published articles on various websites and also periodically maintains two blogs.