How to Make Wallpaper Waterproof

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Waterproofing wallpaper is a simple process that can protect your walls from moisture and mold. Here are the steps to waterproof your wallpaper:

1. Clean the walls: Remove any dirt or debris from the walls using a mild detergent and water. Let it dry completely before proceeding.

2. Apply a waterproofing primer: Use a brush or roller to apply a waterproofing primer to the wallpaper. This will create a barrier that prevents moisture from penetrating the paper.

3. Seal the edges: Use a silicone caulk or waterproof adhesive to seal the edges of the wallpaper. This will prevent water from seeping behind the wallpaper.

4. Apply a waterproof topcoat: Use a paint roller to apply a waterproof topcoat over the wallpaper. This will provide an additional layer of protection against moisture.

5. Let it dry: Allow the waterproofing products to dry completely before exposing the wallpaper to water or humidity.

By following these steps, you can effectively waterproof your wallpaper and ensure its longevity.


Waterproofing wallpaper is often necessary in rooms such as the bathroom or kitchen, where excess humidity and moisture can accumulate. To make wallpaper waterproof, you need to apply a water-based varnish, emulsion glaze, or primer to the wallpaper. It is best to do this work in a temperature of around 70 degrees Fahrenheit with low humidity, avoiding rainy weather.

Waterproof Wallpaper

Step 1

Clean the floor of the room where you will be working to remove dust, dirt, and debris. This will prevent these particles from getting blown onto the wallpaper while it is drying.

Step 2

Repair any damage to the wallpaper, such as peeling edges or cracks. Ensure that all seams of the wallpaper are securely attached to the wall. Fill any cracks between the walls, baseboard, and window frames to prevent the varnish from seeping through and causing discoloration. Apply two coats of weak glue to protect against stains from the varnish, and allow them to dry.

Step 3

Clean the existing wallpaper with mild soap and water to remove dirt and grease. Make sure to let it dry completely.

Step 4

Put on gloves and a respirator for protection.

Step 5

Prepare the varnish, emulsion, or primer by mixing or stirring it gently, avoiding shaking to prevent bubbling.

Step 6

Apply the varnish using a brush, making sure to stroke it evenly and with enough pressure. Avoid overbrushing, as this can cause streaks and brush marks. Allow the varnish to dry for 12 hours.

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