Polymer-Cement Waterproof Slurry (often classified as JS Waterproofing Coating in international trade) is a dual-component elastomeric cementitious membrane formulated for concrete protection and subterranean moisture mitigation. The system integrates a specialized liquid acrylic-copolymer dispersion (Component A) with a factory-blended powder matrix (Component B) comprising ordinary Portland cement, graded silica sand, and reactive inorganic modifiers.
Technical Specifications
|
Technical Parameter |
Test Standard |
Standard Grade (PC-F) |
Rigid Grade (PC-R) |
|
Mixing Ratio (A : B by Weight) |
Internal Gravimetric |
1 : 3 |
1 : 2.5 |
|
Wet Density |
ASTM D1475 |
1.65 ± 0.05 g/cm³ |
1.72 ± 0.05 g/cm³ |
|
Tensile Strength |
ASTM D412 / EN 12390-8 |
>= 1.8 MPa |
>= 2.5 MPa |
|
Elongation at Break |
ASTM D412 |
>= 150% |
>= 35% |
|
Adhesion Strength to Concrete |
ASTM D4541 / EN 1542 |
>= 1.5 MPa |
>= 1.8 MPa |
|
Crack Bridging Ability |
ASTM C836 / EN 1062-7 |
Up to 2.0 mm |
Up to 0.5 mm |
|
Hydrostatic Resistance (Positive) |
EN 12390-8 |
>= 0.7 MPa (72h, no failure) |
>= 1.0 MPa |
|
Impermeability (Negative Side) |
DIN 1048 |
>= 0.3 MPa |
>= 0.5 MPa |
|
Pot Life (20°C) |
ISO 9514 |
45 - 60 minutes |
30 - 45 minutes |
|
Application Temperature |
Site Standard |
+5°C to +35°C |
+5°C to +35°C |
Key Features
Dual-Curing Network: Cross-links hydraulic cement hydration with continuous acrylic film formation, ensuring high early mechanical strength and full curing in deep, confined subterranean spaces.
Dynamic Crack Accommodation: Retains elastic memory under seasonal thermal cycling, preventing moisture infiltration through hairline substrate fractures.
High Surface Energy Bonding: Formulated with active polar groups that establish strong chemical and mechanical anchorage to damp or green concrete substrates without primer peeling.
Alkaline & Hydrolytic Stability: Resists calcium hydroxide leaching, salt crystallization pressure, and continuous immersion in aggressive groundwater environments.
Application Areas
Substructure & Basements: Positive and negative waterproofing for foundation retaining walls, elevator pits, pile heads, and underground utility tunnels.
Podiums & Wet Areas: Waterproofing sub-layers beneath ceramic or stone tile assemblies in commercial kitchens, institutional shower blocks, and multi-story parking podiums.
External Balconies & Terraces: Intermediate elastomeric membrane layer designed to withstand structural deflection beneath heavy pedestrian pavers or deck systems.
Secondary Containment: Wastewater treatment basins, drainage channels, and non-potable concrete water storage structures.
Product Selection Guide
Matching the correct formulation grade prevents premature coating failure under specific site exposure conditions:
Grade PC-F (Flexible Elastomeric)
Profile: High polymer solids, >= 150% elongation.
Application: Vibrating structures, external balconies, roof terraces, and areas subject to thermal expansion or structural shifting.
Grade PC-R (Rigid Mineral Matrix)
Profile: High compressive strength, dense crystalline structure, lower elongation.
Application: Below-grade foundation walls, lift pits, and negative-side hydrostatic pressure zones under constant static load.
Grade PC-T (Thixotropic Repair Grade)
Profile: High yield value, non-sag vertical buildup up to 5 mm per pass.
Application: Detailing around pipe penetrations, cove fillets, and local honeycombed concrete defect repairs prior to membrane application.
OEM & ODM / Customization
We support global brand owners, regional distributors, and engineering contractors with customized manufacturing solutions:
Formulation Tailoring: Adjustment of polymer solid content (ranging from 30% to 50%), viscosity indexes, and setting times to match extreme climate profiles (e.g., high tropical humidity or rapid-curing winter demands).
Color Pigmentation: Standard grey and white base variants, with customized batch coloring options for both liquid emulsions and powder blends.
Private Label Packaging: Multi-language packaging layout services (heavy-duty HDPE pails for liquids, moisture-resistant PE-lined valve sacks for powders), custom barcode generation, and international pallet wrapping.
Regulatory & Compliance Dossier: Full provision of raw material Safety Data Sheets (SDS), technical performance data, and third-party laboratory coordination (SGS, TÜV) for regional market certifications.
Manufacturing & Quality Control
Our plant operates under strict industrial batch processing and quality assurance controls to guarantee batch-to-batch repeatability:
Incoming Raw Material Inspection: Raw acrylic emulsions are tested for solid percentage, viscosity, and pH stability. Portland cement binders are verified for Blaine fineness and hydration reactivity.
Automated Gravimetric Dosing: Computer-controlled weigh scales meter powder components within ± 0.5% accuracy, eliminating formulation ratio errors.
High-Shear Emulsion Dispersion: Liquid polymer components pass through high-speed rotor-stator mixing mills to eliminate agglomerations and ensure uniform molecular distribution.
In-House Laboratory Audit: Every production batch undergoes mandatory pre-shipment testing for wet density, open time, tensile strength, and adhesion. Retained reference samples are stored for 24 months.
Packaging & Storage
Standard Export Configuration:
Master Kit: 20 kg plastic pail (Liquid Component A) + 25 kg multi-wall paper bag with inner PE liner (Powder Component B). Total kit weight: 45 kg.
Contractor Kit: 10 kg pail + 15 kg bag (25 kg kit).
Palletization & Transport: Secured on fumigation-free ISPM 15 compliant wooden or plastic export pallets (32 kits per pallet), wrapped with stretch film and edge protectors for safe containerized maritime transport.
Storage Guidelines: Store in dry, indoor conditions off the ground. Prevent liquid component from freezing (minimum storage temperature +5°C). Shelf life is 12 months in unopened, original factory packaging.
FAQ
Q: Can this slurry be applied to green or saturated concrete?
A: Yes, the substrate must be in a Saturated Surface Dry (SSD) condition with no standing water or active running leaks. Active leaks must be sealed with fast-setting hydraulic plugging mortar prior to application.
Q: What is the recommended dry film thickness (DFT) for full waterproofing performance?
A: A minimum total dry film thickness of 1.5 mm to 2.0 mm is required, typically applied in two or three cross-directional coats to eliminate pinholes and ensure uniform encapsulation.
Q: Is the cured membrane compatible with cementitious tile adhesives?
A: Yes. The cementitious-rich surface profile delivers an optimal rough texture and strong chemical bond for polymer-modified tile adhesives (meeting C2TE classifications).
Q: What shipping documents are provided with each container export?
A: Every shipment includes a Certificate of Analysis (CoA) matching the specific batch numbers, Commercial Invoice, Packing List, Bill of Lading, and Technical Data Sheets.
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