Exterior Wall Waterproofing Coating

How to Properly Apply Exterior Wall Waterproofing Coating: A Step-by-Step Guide

The content provides a clear and concise step-by-step guide on how to properly apply exterior wall waterproofing coating. It covers all the necessary aspects, from surface preparation to quality inspection. Here are a few suggestions to further improve the Wall Waterproofing.


Exterior wall waterproofing is a critical aspect of building maintenance and construction. Properly applied waterproofing coatings can protect buildings from water infiltration and moisture-related damage, thereby prolonging the structure's life. In this article, we will provide a comprehensive step-by-step guide on how to effectively perform exterior wall waterproofing coatings.

Step 1: Surface Preparation

Before applying any waterproofing coating, the exterior walls must be thoroughly cleaned and prepared. Follow these steps:

  1. Clean the surface: Remove dirt, dust, grease, and loose particles using a high-pressure washer or a stiff brush.
  2. Repair cracks and damages: Fill any cracks or gaps using an appropriate Crack filler kit. Ensure the surface is smooth and even.
  3. Remove old coatings: If there are existing coatings that have deteriorated or are incompatible with the new waterproofing material, strip them off completely.

Step 2: Choose the Right Waterproofing Coating

Selecting the appropriate waterproofing material is crucial for the success of the project. There are various types of coatings available, such as acrylic-based, cementitious, or elastomeric coatings. Consider factors such as climate, building material, and the level of waterproofing required before making your decision. We suggest Waterseal Psv is the Best for the Indian climate

Step 3: Priming

Priming the exterior walls is essential as it enhances the adhesion of the waterproofing coating and ensures uniform coverage. Apply a coat of primer specifically designed for the chosen waterproofing material. Allow the primer to dry completely, following the manufacturer's instructions. Mixing 1 part of Waterseal PSv, 1 part of Water, and 1 part of White Cement is the best combination for a primer.

Step 4: Application of Waterproofing Coating

The actual application process is critical to achieving an effective and durable waterproofing layer. Here's how to do it:

  1. Stir the coating: Thoroughly mix the waterproofing material using a stirrer to ensure uniform consistency. Mixing 1 part of Waterseal PSv, 1 part of Water, and 2 parts of White Cement for all Coating on the Walls.
  2. First coat application: Using a roller or a brush, apply the first coat of the waterproofing material evenly on the exterior wall surface. Follow the manufacturer's recommended coverage rate. Pay special attention to corners, edges, and joints.
  3. Reinforcement: For added strength and crack resistance, embed a layer of reinforcing fabric into the wet first coat. Gently press the fabric to remove air bubbles and wrinkles.
  4. Second coat application: After the first coat has dried, apply the second coat following the same technique as the first coat. Ensure complete coverage and uniform thickness.

Step 5: Curing and Drying

Allow the waterproofing coating to cure and dry according to the manufacturer's guidelines. This period may vary depending on the product and environmental conditions. Keep the coated area protected from heavy rain or extreme weather during the curing process.

Step 6: Quality Inspection

Inspect the waterproofing coating after drying to ensure there are no missed spots, bubbles, or areas with inadequate coverage. Touch up any imperfections, if necessary.


Exterior wall waterproofing coating is a vital investment in maintaining the integrity and longevity of any building. By following this step-by-step guide and using high-quality materials, you can effectively protect your structure from water damage and moisture-related issues. Remember, proper surface preparation, material selection, and application techniques are the key to successful exterior wall waterproofing. Always follow the manufacturer's guidelines and seek professional assistance when needed.

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