Underground Structures
Heavy-duty waterproofing for basements, foundations, tunnels, and civil air defense works.
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Waterproof Coatings
Polyurethane Waterproof Coating for Roof and Basement
High-performance liquid-applied polyurethane waterproof coating. Forms a seamless, highly elastic rubber-like membrane for complex roofing, basements, and underground structures.
PU CoatingGB/T 19250-2013Single / Two ComponentSeamless FilmDamp Base AdhesionOEM Available
Standard
GB/T 19250-2013
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Quick Specifications
Product Type
Polyurethane (PU) Waterproof Coating
Standard
GB/T 19250-2013
Components
Single-component (Moisture-cure) / Two-component (1:2 Ratio)
Packaging
20kg / 25kg Metal Drum
Dosage (1mm)
Approx. 1.3 - 1.5 kg/sqm
Elongation
>=450% (High Elasticity)
Drying Time
Surface Dry >=8h; Hard Dry >=24h
Storage
Dry shade below 40degC, 12 months shelf life
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Product Overview
High-Performance Liquid-Applied Waterproofing
Polyurethane (PU) waterproof coating is the ultimate solution for seamless, joint-free protection. By curing into a tough, rubber-like elastic film, it provides an impenetrable barrier that perfectly conforms to the most irregular substrates and complex pipeline penetrations.
Ideal for high-end residential basements, commercial kitchens, and large-scale civil engineering, Tianyuan’s PU coating offers extreme tensile strength and low-temperature flexibility. As a factory-direct manufacturer, we provide both single and two-component systems with full OEM support for drum branding and color customization.
Quick Facts
Seamless Protection
Forms a continuous, monolithic elastic film without joints, effectively eliminating the risk of seam leakage.
Strong Adhesion
Excellent cohesive force on concrete, wood, metal, and damp substrates, providing versatile application options.
High Elasticity
The rubber-like cured film accommodates structural movements, vibration, and thermal expansion without cracking.
Detail Specialist
Perfect for complex pipeline areas, corners, and irregular shapes where sheet membranes are difficult to install.
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Applications
Kitchens & Bathrooms
Ideal for indoor wet areas, balconies, and lavatories requiring a reliable seamless barrier.
Roofing Systems
Suitable for non-exposed flat roofs, terraces, canopies, and complex roof refurbishment projects.
Civil Infrastructure
Applicable for bridge decks, reservoirs, sewage plants, and large-scale municipal waterproofing.
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Key Benefits
Moisture-Cure Technology
Single-component formula reacts with air moisture to cure, providing convenient on-site application.
Extreme Cold Flex
Maintains flexibility at temperatures as low as -40degC, ensuring performance in harsh winter climates.
Chemical Resistance
Superior resistance to environmental pollutants, mild acids, and alkalis commonly found in soil.
Color Customization
Available in multiple colors to meet project-specific aesthetic and identification requirements.
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Technical Data
| Test Item | Unit | Test Method / Standard | Requirement / Class | Result / Notes |
|---|---|---|---|---|
| Applicable Standard | >= | GB/T 19250-2013 | Standard Conformity | Passed |
| Solid Content (Single) | % | GB/T 19250 | >=92 | 94% |
| Tensile Strength | MPa | GB/T 19250 | Type II >=2.45 | 3.0+ |
| Breaking Elongation | % | GB/T 19250 | >=450 | 550%+ |
| Low Temp Flexibility | degC | GB/T 19250 | >=-35degC | Passed |
| Impermeability | MPa | GB/T 19250 | 0.3MPa, 30min | Watertight |
| Wet Base Adhesion | MPa | GB/T 19250 | >=1.0 | 1.2+ |
The above values are typical reference values from laboratory tests and do not constitute a warranty. Full TDS is available on request.
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Installation Guide
Base Preparation
Substrate must be firm, smooth, and free from loose particles, oil, and standing water.
Detail Reinforcement
Apply extra coating at internal/external corners, pipe roots, and expansion joints first.
Mixing (Two-Comp)
Stir Group A and B thoroughly in a 1:2 ratio until a uniform color and consistency are achieved.
Multi-layer Coating
Apply in 2-3 layers. Each layer should be perpendicular to the previous one after it becomes tack-free.
Thickness Control
Maintain a total thickness of 1.5mm>=.0mm for optimal performance in underground projects.
Protection
Ensure proper ventilation. Protect the finished layer from physical damage until fully cured.
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Packaging & OEM
Industrial Drums
Supplied in 20kg or 25kg airtight metal drums to ensure long-term chemical stability.
Storage Condition
Keep in a cool, ventilated area below 40degC. Protect from direct sunlight and moisture.
OEM Customization
Full support for custom drum designs, private labels, and specific color formulations.
Efficient Loading · Secure Packing · Global Delivery
Shelf Life
12 Months in original airtight packaging
Container Load
Customized based on drum size and weight
Mixing Ratio
1:2 for two-component type
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Downloads
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FAQ
Can PU coating be applied on a damp substrate?
Yes, our PU coating is designed with high adhesive strength (>=.0MPa) for damp base surfaces, provided there is no standing water.
Is single-component PU better than two-component?
Single-component is more convenient for small or complex areas as it's ready-to-use. Two-component is often preferred for large-scale industrial projects due to cost-efficiency and curing speed.
Is this coating suitable for exposed roofs?
While highly resistant, we recommend a protective topcoat or non-exposed application for maximum service life under direct UV.
Ready To Start Your Project?
Contact our team for competitive quotations and technical support.