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Ensuring leak-free concrete structures requires more than just high-quality materials—it demands precise application techniques and an understanding of the product’s features. Cement-based waterproof materials are widely used for protecting foundations, roofs, balconies, swimming pools, and other concrete surfaces from water penetration.
Wanhong Chemical, through its Tianbao Lan brand, offers high-performance cement-based waterproof solutions that combine strong bonding, elasticity, environmental safety, and long-term durability. This guide provides a practical, step-by-step process to help engineers, contractors, and DIY enthusiasts achieve optimal waterproofing results.
1. Surface Preparation
Proper preparation of the substrate is critical for maximum adhesion and effectiveness:
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Clean the surface: Remove dust, loose concrete, oil, grease, or previous coatings.
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Repair cracks and holes: Fill any major gaps larger than 2mm before applying the coating. Fine cracks (≤2mm) can be bridged by the material’s elasticity.
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Moistening the base: Cement-based waterproof coatings can be applied on damp surfaces, but standing water should be removed.
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Smooth the surface: Ensure uneven spots are leveled for uniform coating thickness.
Tip: Tianbao Lan coatings chemically bond with concrete or mortar, forming a durable, non-peeling layer that supports subsequent finishing materials like tiles or stones.
2. Choosing the Right Product for the Application
Wanhong Chemical’s cement-based waterproof materials have features tailored for various environments:
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High elasticity and crack resistance: Acrylic emulsion ensures fine crack coverage and adapts to thermal expansion/contraction.
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Double waterproof mechanism: Combines polymer film waterproofing and cement hydration crystallization for superior anti-seepage performance.
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Weather and water resistance: Works in outdoor conditions (-20℃~80℃) and long-term immersion environments like swimming pools.
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Environmentally friendly: Water-based and non-toxic, meeting GB 18582-2020 indoor standards, ideal for kitchens, bathrooms, or other enclosed spaces.
3. Mixing and Preparation
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Follow manufacturer ratios: Typically, powder and liquid components must be mixed thoroughly to a consistent paste.
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Avoid lumps: Use mechanical mixing for larger projects to ensure uniformity.
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Check working time: Cement-based materials begin to set after a limited period; plan applications accordingly.
Tip: Tianbao Lan provides pre-blended formulas that simplify mixing and reduce on-site errors, saving labor costs.
4. Application Techniques
Cement-based waterproof materials can be applied using multiple methods depending on project scale and substrate:
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Brushing: Ideal for corners, edges, and small areas. Ensures full penetration into fine cracks.
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Rolling: Efficient for larger flat surfaces like roofs and balconies.
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Scraping/Spreading: Achieves uniform thickness, especially on uneven surfaces.
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Spraying (for specialized equipment): Suitable for large-scale infrastructure projects.
Best practice: Apply the first layer thinly and allow partial drying before applying subsequent layers. Typically, two coats are recommended for optimal waterproofing.
5. Layering and Curing
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Layering: Minimum two layers, each 1–2 mm thick, to ensure complete coverage.
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Curing: Allow 2–4 hours between layers (depending on temperature and humidity). Full curing may take up to 24 hours.
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Moist curing optional: Lightly misting the surface can enhance polymer film formation and crystallization.
Pro tip: For color inspection or quality control, Tianbao Lan coatings support gray, blue, and other colors for visual verification during construction.
6. Environmental and Safety Considerations
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Non-toxic and water-based: Safe for indoor and outdoor use. No harmful solvent emissions.
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Compliant with regulations: Meets indoor environmental standards and EU RoHS guidelines.
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Application in confined spaces: Safe for kitchens, bathrooms, and small rooms without ventilation concerns.
Tip: Proper protective equipment should still be used to prevent inhalation of dust during powder handling.
7. Advantages of Cement-Based Waterproof Materials
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Durability: Resistant to UV, temperature fluctuations, and long-term water immersion.
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Strong adhesion: Chemically bonds with base surfaces, reducing risk of delamination.
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Elasticity: Bridges fine cracks, accommodating structural movements.
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Ease of construction: Brushing, rolling, scraping, or wet surface application saves labor time.
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Versatile finishes: Can be tiled, painted, or left exposed as per design requirements.
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Double waterproof mechanism: Polymer film + cement crystallization enhances anti-seepage efficiency.
8. Common Applications
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Residential roofs and balconies: Prevents leaks and protects structural concrete.
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Swimming pools and water tanks: Long-term immersion resistance.
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Kitchens and bathrooms: Safe for indoor waterproofing.
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Industrial floors: Provides chemical and water resistance for heavy-duty environments.
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Basements and foundations: Protects against groundwater infiltration.
Case Study: Tianbao Lan cement-based waterproof coatings have been applied in the Shenzhen Metro and Hangzhou Asian Games venues, demonstrating excellent long-term performance and durability.
9. Maintenance and Inspection Tips
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Inspect coated surfaces periodically for signs of wear or minor cracks.
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Repair minor damage immediately using the same cement-based material.
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Avoid using strong acids or alkalis directly on the surface, which may affect performance.
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For outdoor exposed areas, reapply a protective topcoat if UV degradation is observed over many years.
10. FAQ Section
Q1: Can cement-based waterproof materials be applied on wet surfaces?
A: Yes, these materials can be applied on damp surfaces without pooling water, making them ideal for partially wet substrates.Q2: How many layers are required for effective waterproofing?
A: Typically, two coats are recommended, each 1–2 mm thick, ensuring complete coverage and maximum leak protection.Q3: Are these coatings suitable for indoor applications?
A: Yes, Wanhong Chemical’s water-based materials are non-toxic and meet indoor environmental standards like GB 18582-2020, suitable for kitchens, bathrooms, and other enclosed spaces.Q4: Can the coatings handle structural movement?
A: Yes, the high elasticity allows bridging fine cracks and accommodates thermal expansion and minor structural shifts.Q5: How long before the coating fully cures?
A: Surface drying occurs within 2–4 hours; full curing takes about 24 hours, depending on temperature and humidity.
Conclusion
Properly applying cement-based waterproof materials is essential for leak-free, durable concrete structures. By following surface preparation, correct application methods, layering, and curing practices, engineers and contractors can maximize the performance of these high-performance coatings.
Wanhong Chemical’s Tianbao Lan cement-based waterproof materials combine elasticity, strong bonding, environmental safety, and dual waterproof mechanisms to provide reliable, long-term protection for residential, commercial, and industrial projects.
Choosing the right product and applying it correctly ensures structural longevity, water resistance, and reduced maintenance costs, making cement-based waterproofing an indispensable solution in modern construction.
http://www.tebolam.com
Huizhou Wanhong Chemical Co., Ltd. -
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