Polymer Cement Waterproof Coating (JS Waterproofing Coating) is a two-component, water-based waterproof system composed of a polymer emulsion and a cement-based powder. After mixing, it forms a flexible cementitious coating that combines the elasticity of organic polymers with the strength of cement-based materials.
The material chemically bonds with cementitious substrates during curing, creating a dense and integrated waterproof layer that becomes an inseparable part of the base surface. It provides strong resistance against water penetration, delamination, and cracking caused by structural movement.
JS coating can be applied on both damp and dry substrates, making it highly adaptable to various construction conditions. It is non-toxic, water-based, and environmentally friendly, suitable for indoor and residential waterproofing applications such as kitchens, bathrooms, and water-containing structures.
Once cured, the membrane maintains a balance of flexibility and rigidity, allowing it to bridge micro-cracks while maintaining long-term waterproof performance. It is widely used in residential buildings, underground structures, and concrete surface protection systems.
Key Features & Benefits
When waterproofing projects require strong adhesion, flexibility, and safe application in wet environments, QINGYUAN JS Polymer Cement Waterproof Coating provides a reliable solution for residential, commercial, and underground waterproofing applications.
Flexible and rigid properties combine to provide excellent crack resistance and long-lasting waterproof protection.
Strong bonding with cement-based substrates creates an integrated waterproof layer without peeling or delamination.
Suitable for damp surfaces without complete drying, improving construction efficiency in various environments.
Water-based and environmentally friendly formulation contains no harmful substances, making it safe for indoor applications.
Dual waterproof performance supports both positive-side and negative-side waterproofing applications.
Excellent resistance to water immersion, acids, and alkalis ensures long-term durability in harsh environments.
High flexibility allows the coating film to follow minor substrate movement without cracking.
Easy mixing and application by roller or brush simplify installation and repair work.
Wide application range covers bathrooms, kitchens, basements, water tanks, pools, and exterior walls.
Our Product Specifications
- Cold-applied self-adhesive system, no torch and no primer required for safe and efficient installation.
- High-performance modified bitumen adhesive ensures strong bonding to concrete, mortar, and metal substrates.
- Waterproof performance: withstands 0.3MPa water pressure for 30 minutes without leakage.
- Low-temperature flexibility: -20°C without cracking, suitable for cold and underground applications.
- Tensile strength: ≥500N/50mm, ensuring reliable mechanical durability.
- Elongation: ≥800%, providing excellent resistance to structural movement and deformation.
- Self-healing adhesive layer automatically seals micro-cracks and punctures to prevent water penetration.
- Standard thickness options: 1.2mm / 1.5mm / 2.0mm / 3.0mm for different application requirements.
You get more than waterproofing — you get long-term protection, structural stability, and worry-free performance in every climate.
Standard Construction Process
Professional installation methods ensure strong bonding, uniform coating performance, and reliable waterproof protection for different building structures.
Base Surface Preparation
Clean dust, oil stains, loose materials, and repair cracks or uneven areas. Ensure the substrate is solid and free from standing water before application.
Material Mixing Preparation
Mix liquid and powder components according to the recommended ratio. Use an electric mixer until a smooth and uniform waterproof slurry is achieved.
Detail Reinforcement Treatment
Apply an additional coating layer to corners, pipe penetrations, drainage areas, and joints. Install reinforcement mesh where required.
Layered Coating Application
Apply the first coat evenly in one direction. After drying, apply the second coat crosswise to ensure complete coverage and uniform thickness.
Curing & Protection
Allow the waterproof coating to cure naturally after application. Protect the surface from water, impact, and damage during the curing period.
Water Testing & Final Inspection
Perform a 24–48 hour water test after curing. Confirm no leakage or moisture penetration before proceeding with further construction.
Our Guarantee
As a trusted waterproofing material manufacturer, QINGYUAN Waterproof focuses on product innovation, precise manufacturing, and strict quality management. We ensure every roll is produced according to standard specifications, providing consistent quality, reliable performance, and dependable solutions for global construction projects.
1. Raw Material Assurance
We use high-grade bitumen and SBS elastomer to ensure stable modification performance and consistent product quality.
2. Manufacturing Quality Control
Every roll is produced under standardized manufacturing processes with strict control of thickness, weight, and surface uniformity.
3. Performance Compliance Assurance
All products are tested according to GB 18242-2008 standard, ensuring key performance such as tensile strength, flexibility, and waterproofing meet requirements.
4. Factory Consistency Assurance
We ensure stable batch-to-batch production consistency to support reliable large-scale engineering supply.
Our Installation Projects
