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Cementitious waterproof coatings are widely used in building protection due to their strong adhesion, durability, and compatibility with various substrates. To achieve optimal waterproofing performance, proper construction practices are essential. Below are the key construction precautions recommended for ensuring quality results, especially when working with professional suppliers such as Wuxi Shanyi New Building Materials Co., Ltd.

1. Appropriate Construction Temperature

Temperature plays a critical role in the curing and bonding process of cementitious waterproof coatings.

• The ideal construction temperature is typically between 5°C and 35°C.

• Avoid application under extreme heat or cold, as low temperatures slow curing while high temperatures may cause cracking or rapid moisture loss.

• When applying outdoors, schedule construction to avoid direct midday sunlight.

2. Humidity Requirements

Ambient humidity affects drying, film formation, and adhesion.

• High humidity can delay curing and reduce early strength.

• Very low humidity can cause overly rapid drying, leading to shrinkage or surface cracks.

• Ensure the substrate is clean, moist but not waterlogged before applying cementitious waterproof coatings.

3. Proper Curing Time

Curing time determines the coating’s final mechanical strength and waterproofing ability.

• Typically, cementitious coatings require 24–48 hours for initial curing, depending on environmental conditions.

• Full curing may take 7 days or longer.

• Keep the surface protected from rain, water impact, and heavy loads during early curing.

4. Correct Interval Between Coating Layers

For multilayer applications, the interval between coats is crucial for uniform protection.

• Apply the second layer only after the first layer has fully dried and reached initial cure, usually 4–24 hours depending on the specific formulation.

• Too short an interval can cause peeling or insufficient bonding.

• Too long an interval may require surface re-wetting to ensure adhesion.

5. Compatibility With Other Materials

Before application, check compatibility with substrates and subsequent materials.

• Cementitious waterproof coatings work well with concrete, masonry, and mortar surfaces.

• Avoid applying on oily, dusty, or smooth surfaces without proper treatment.

• If the coating will be covered by tiles, screeds, or paints, ensure chemical and mechanical compatibility to prevent delamination or damage.

By following these essential construction precautions, cementitious waterproof coatings can deliver long-lasting and effective waterproofing performance. Wuxi Shanyi New Building Materials Co., Ltd. continues to provide high-quality materials and technical support to ensure safe, efficient, and durable waterproofing solutions for various building applications.

https://www.shanyijc.com/key-construction-precautions-for-cementitious-waterproof-coatings.html
Wuxi Shanyi New Building Materials Co., Ltd.

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