Solvent-Based Polyurethane Waterproof Coating is a high-performance reactive waterproof system formulated from isocyanate prepolymers, organic solvents, fillers, and functional additives. It is available in both single-component and two-component (A/B) systems, and cures through chemical reaction after application to form a dense, seamless, rubber-like waterproof membrane.
The cured membrane provides excellent impermeability and high elasticity, enabling it to accommodate structural movement, settlement, and thermal expansion without cracking or failure. It bonds strongly to dry concrete, cement mortar, metal, wood, and old asphalt-based waterproof layers.
Compared with water-based systems, solvent-based polyurethane offers higher film density, stronger waterproofing performance, and superior low-temperature flexibility, making it suitable for demanding underground and long-term water-exposed environments such as basements, roofs, and water-retaining structures. Proper ventilation and fire safety measures are required during application due to solvent content.
Key Features & Benefits
When waterproofing projects require high elasticity, strong adhesion, and superior resistance to water and environmental conditions, QINGYUAN Oil-Based Polyurethane Waterproof Coating provides a durable seamless waterproof solution for demanding applications.
High-density waterproof film provides excellent impermeability and prevents water penetration under long-term pressure.
Exceptional elasticity with over 600% elongation adapts to substrate movement and prevents cracking caused by deformation.
Outstanding low-temperature flexibility maintains performance at temperatures as low as -35℃ without cracking.
Strong adhesion bonds firmly with concrete, cement mortar, metal, wood, and existing waterproof membranes.
Seamless liquid application forms a continuous waterproof layer without joints or overlap leakage risks.
Excellent resistance to acids, alkalis, corrosion, and aging ensures long-term durability in harsh environments.
Superior heat resistance maintains stability at high temperatures without flowing or dripping.
Suitable for long-term immersion applications including basements, water tanks, tunnels, and underground structures.
Flexible application methods allow roller and brush installation for various waterproofing projects.
Our Product Specifications
- Product type: Solvent-based polyurethane waterproof coating (single-component / two-component)
- Appearance: Black viscous liquid
- Application method: Roller coating or scraper application
- Recommended dry film thickness: Underground structures: ≥1.5mm Roofs: ≥1.2mm Water tanks: ≥2.0mm
- Theoretical consumption: approx. 1.2–1.4 kg/m² per 1mm thickness
- Solid content: ≥85%
- Low-temperature flexibility: -35°C without cracking
- Heat resistance: 130°C without flow or dripping
- Elongation at break: ≥600%
- Tensile strength: ≥1.5 MPa
- Waterproof resistance: 0.3MPa / 30 minutes without leakage
- Adhesion strength (dry concrete): ≥0.8 MPa
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 adhesion, uniform coating performance, and long-lasting waterproof protection for different construction environments.
Base Surface Preparation
Ensure the substrate is dry and clean. Remove dust, oil stains, and loose materials. Repair cracks and uneven areas before application.
Material Mixing Preparation
Stir single-component products evenly. For two-component systems, mix components according to the specified ratio until a uniform coating material is achieved.
Detail Reinforcement Treatment
Apply additional coating layers to corners, pipe penetrations, expansion joints, and other weak areas. Install reinforcement mesh where required.
Layered Coating Application
Apply the first coat evenly in one direction. After sufficient drying, apply additional coats crosswise to achieve the required waterproof thickness.
Curing & Protection
Allow the coating to cure naturally after application. Protect the waterproof layer from water, impact, and heavy loads during curing.
Water Testing & Final Inspection
After complete curing, perform a 24–48 hour water test to confirm waterproof performance before applying protective layers or continuing 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
