Our Fast-Curing Polyurethane Waterproof Coating is a moisture-reactive, liquid-applied elastomeric membrane engineered for high-demand structural waterproofing. Upon application, the liquid polymer reacts with ambient relative humidity to cross-link into a seamless, fully adhered, jointless rubber barrier.
Designed specifically for tight construction schedules, this formulation achieves a tack-free state within 2 to 4 hours at 23°C and 50% RH, significantly reducing the risk of rain damage during application. It accommodates high dynamic structural movement and resists continuous hydrostatic pressure, serving as a primary waterproofing layer for horizontal and vertical concrete substrates in commercial, industrial, and civil infrastructure projects.
Technical Specifications
|
Property |
Typical Value |
Test Standard |
|
Chemical Base |
Single-Component / Moisture-Cured Polyurethane |
ASTM C836 / ISO 15441 |
|
Solid Content |
>= 92% |
ASTM D2697 |
|
VOC Content |
<= 100 g/L (Low-VOC Compliant) |
EPA Method 24 / ASTM D3960 |
|
Tensile Strength |
>= 2.5 MPa |
ASTM D412 |
|
Elongation at Break |
>= 600% |
ASTM D412 |
|
Tear Strength |
>= 25 N/mm |
ASTM D624 |
|
Adhesion to Concrete |
>= 1.5 MPa (Concrete failure) |
ASTM D4541 |
|
Tack-Free Time |
2 - 4 hours (23°C, 50% RH) |
ASTM C679 |
|
Full Cure Time |
24 - 48 hours |
Internal Lab Method |
|
Service Temperature |
-40°C to +90°C |
- |
|
Crack-Bridging Ability |
>= 2.0 mm (At -10°C) |
ASTM C836 |
Key Features
Rapid Moisture Curing: Initiates cross-linking via ambient humidity, reaching a rain-resistant film state in under 4 hours to eliminate weather-delay risks on active job sites.
High Elasticity & Recovery: Retains over 600% elongation with permanent elastic recovery, absorbing thermal expansion, structural shifting, and micro-crack propagation up to 2.0 mm.
Seamless Monolithic Barrier: Forms an impenetrable, fully bonded membrane that eliminates lap-joint failures common in prefabricated sheet membranes.
High Solid & Low VOC Formulation: Contains over 92% active polymer content while meeting strict regional environmental regulations (<= 100 g/L VOC), minimizing dry film shrinkage and ensuring consistent membrane thickness.
Substrate Compatibility: Formulates strong chemical and mechanical anchor bonds to properly primed concrete, metal, cementitious screeds, and existing sound membrane surfaces.
Application Areas
Commercial & Industrial Roofing: Exposed flat roofs, inverted roof assemblies, and podium decks requiring heavy mechanical resistance and fast turnover.
Subterranean & Foundation Structures: Retaining walls, basement exterior walls, and elevator pits subjected to negative or positive hydrostatic pressure.
Parking Decks & Ramps: Intermediate decks and vehicular traffic surfaces exposed to dynamic wheel loads, oil dripping, and chemical de-icers (requires broadcast quartz aggregate and wearing topcoat).
Wet Rooms & Balconies: Bathrooms, kitchens, balconies, and terraces underneath ceramic tile or stone finishes.
Civil Infrastructure: Bridge decks, tunnel linings, and culverts requiring long-term resistance to freeze-thaw cycles and root penetration.
Product Selection Guide
Selecting the correct grade depends on substrate geometry, application method, and environmental exposure limits. Review the matrix below to match project requirements:
|
Grade Identifier |
Viscosity / Application Method |
Recommended Substrate |
Primary Use Case |
|
PU-F80 (Standard) |
Medium Viscosity / Roller, Squeegee |
Horizontal Concrete Decks |
Large flat roofs, podium decks, general waterproofing |
|
PU-F85 (Thixotropic) |
High Viscosity / Trowel, Brush |
Vertical Walls, Details, Flashings |
Parapets, pipe penetrations, upstands, vertical retaining walls |
|
PU-F90 (Spray Grade) |
Low Viscosity / Airless Spray Equipment |
Large-Scale Industrial Foundations |
High-speed application for massive infrastructural footprints |
OEM & ODM / Customization
We operate as a direct manufacturing partner supporting private label and custom specification requirements for global distributors and contractors.
Viscosity Modification: Rheology adjustment for specific climatic conditions (tropical high-temperature vs. cold-weather formulations).
Color Matching: Standard colors include grey, black, and white; custom pigmented batches available upon meeting minimum order quantities (MOQ).
Packaging & Private Label: Custom steel drum or plastic pail printing with your brand logos, hazard compliance labels, and multilingual technical data sheets (TDS).
Formulation Adaptation: Tailoring solid content, VOC profiles, elongation rates, or cure-rate kinetics to comply with regional building codes (e.g., ASTM, EN 1504-2, SCAQMD rule 1113).
Manufacturing, Capacity & Quality Control
Production is executed in our automated, closed-loop chemical synthesis facility utilizing vacuum-sealed dispersion reactors to prevent moisture contamination during compounding.
Raw Material Verification: Incoming prepolymers, isocyanates, and functional fillers undergo strict batch testing for moisture content (Karl Fischer titration) and viscosity before entering production lines.
Process Control: Computer-controlled mixing and grinding monitored via inline temperature and torque sensors to guarantee uniform particle dispersion and prevent premature gelation.
Batch Testing Protocol: Every production lot is sampled and tested in our certified laboratory for solid content, VOC levels, tensile strength, tear resistance, and gel time prior to packaging release. Certificates of Analysis (CoA) are archived and provided with every shipment.
Environmental Standards: Facilities operate under ISO 9001 (Quality Management) and ISO 14001 (Environmental Management) certifications, with VOC emissions controlled via thermal oxidizers.
Packaging & Storage
Standard Packaging:
20 kg / 25 kg steel pails (lined with moisture-barrier plastic).
200 kg steel drums for large-scale commercial projects.
Storage Conditions: Store in original, unopened containers in a dry, shaded warehouse environment between 5°C and 30°C. Keep away from direct sunlight, open flames, and moisture sources.
Shelf Life: 12 months from the date of manufacture when stored in accordance with specified guidelines. Opened containers must be tightly resealed and consumed within 48 hours to prevent moisture-induced curing.
FAQ
Q: Can this coating be applied directly to damp concrete substrates?
A: Standard polyurethane coatings require substrate moisture content to be <= 4%. Applying over green or high-moisture concrete without a proper moisture-blocking epoxy primer will result in vapor pressure buildup, leading to blistering and delamination.
Q: Is a primer required prior to application?
A: Yes. We strictly recommend applying a compatible single-component or two-component polyurethane/epoxy primer (e.g., PR-100 series) to seal concrete pores, eliminate micro-dust, and ensure chemical bonding between the substrate and the waterproof membrane.
Q: What is the recoat window between multiple layers?
A: The recoat window is typically between 6 to 24 hours at 23°C. If the previous layer has cured beyond 48 hours and developed a completely inactive surface, solvent wiping or mechanical abrading is required to establish interlayer adhesion.
Q: How is the product shipped internationally?
A: The product is classified as a hazardous chemical for transport due to solvent and isocyanate content (UN 1263, Paint or Paint-related material, Class 3, Packing Group III). It is loaded strictly in accordance with IMO/IMDG codes for ocean freight in 20ft dry containers.
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