Polymer-Cement JS Waterproof Coating is a dual-component reactive waterproofing system. It combines an acrylic-copolymer liquid emulsion with a specialized Portland cement-graded mineral powder blend. Upon mixing, the components undergo hydration and cross-linking to form a seamless, elastic, and vapor-permeable elastomeric membrane that bonds permanently to concrete, masonry, and screed substrates.
System Type: Two-component (Component A: Liquid Polymer; Component B: Modified Powder)
Primary Function: Substrate crack-bridging and hydrostatic pressure resistance in wet environments
Curing Mechanism: Combined chemical hydration and physical coalescence
Technical Specifications
Tested in accordance with ASTM C836 / GB/T 23445-2009 standards under standard laboratory conditions (23±2°C, 50±5% RH). All batches are verified for compliance under ISO 9001 quality assurance frameworks.
|
Technical Parameter |
Type I (Flexibility-Focused) |
Type II (Strength-Focused) |
Test Standard |
|
Mixing Ratio (A by weight) |
1:1.2 to 1:1.5 |
1:3 to 1:3.5 |
Factory Specification |
|
Solid Content (%) |
≥ 92% |
≥ 95% |
ISO 3251 |
|
Tensile Strength (MPa) |
≥ 1.2 |
≥ 1.8 |
ASTM D412 |
|
Elongation at Break (%) |
≥ 200% |
≥ 80% |
ASTM D412 |
|
Bond Strength to Concrete (MPa) |
≥ 1.0 |
≥ 1.2 |
ASTM C794 |
|
Impermeability (0.3 MPa, 30 min) |
No Leakage |
No Leakage |
GB/T 23445 / EN 14891 |
|
Crack-Bridging Ability (mm) |
≥ 1.5 |
≥ 0.8 |
EN 14891 |
|
Application Temperature (°C) |
+5°C to +35°C |
+5°C to +35°C |
Site Condition |
Key Features
Inorganic-Organic Synergy: Fills capillary pores within concrete via cement hydration while forming an interpenetrating polymer network (IPN) film to block moisture migration.
Substrate Compatibility: Formulated for application on damp substrates (without standing water), eliminating primer requirements on sound concrete surfaces.
Dynamic Crack Bridging: Accommodates structural thermal movement and minor substrate micro-cracking up to 1.5 mm (Type I).
Environmental Profile: Water-based, solvent-free formulation meeting low-VOC emission limits (compliant with SCAQMD Rule 1113 and EU VOC directives).
Application Areas
Inorganic-Organic Synergy: Fills capillary pores within concrete via cement hydration while forming an interpenetrating polymer network (IPN) film to block moisture migration.
Substrate Compatibility: Formulated for application on damp substrates (without standing water), eliminating primer requirements on sound concrete surfaces.
Dynamic Crack Bridging: Accommodates structural thermal movement and minor substrate micro-cracking up to 1.5 mm (Type I).
Environmental Profile: Water-based, solvent-free formulation meeting low-VOC emission limits (compliant with SCAQMD Rule 1113 and EU VOC directives).
Water Management: Non-potable water reservoirs, irrigation channels, and plant-room sumps.
Product Selection Guide
Selecting the correct grade depends on structural movement and mechanical load requirements:
Type I (High Flexibility): Specify for areas prone to thermal cycling or structural vibration, including roofs, exterior balconies, and high-rise foundation walls subject to settlement.
Type II (High Mechanical Strength): Specify for heavy-traffic areas, floor slabs, podium decks, and tile-fixed wet rooms requiring higher compressive resistance before finishing.
Coverage Calculation:
Standard thickness: 1.5 mm dry film thickness requires approximately 2.2 to 2.5 kg/m² applied in 2 to 3 cross-layers.
OEM & ODM / Customization
We provide comprehensive private label and formulation tailoring services for global distributors and brand owners:
Rheology Adjustment: Viscosity modification tailored for roller, brush, or heavy-duty trowel application.
Color Matching: Pigmentation options available for Component A liquid (standard milky white, grey, or blue) to verify layer coverage on site.
Private Label Packaging: Custom high-density polyethylene (HDPE) pails and multi-wall paper bags featuring client artwork, barcodes, and local language compliance.
Regulatory & Compliance Support: Formulation dossiers, full Technical Data Sheets (TDS), Safety Data Sheets (SDS), and third-party test reports provided to assist with regional building material registrations and customs clearance.
Manufacturing & Quality Control
Production Standards & Certifications: Manufacturing operations comply fully with ISO 9001 (Quality Management System) and ISO 14001 (Environmental Management System) standards. Products meet or exceed applicable requirements for CE marking standards and relevant ASTM/EN test protocols.
Production Capacity: Automated high-shear dispersion lines for emulsion blending and precision gravimetric batching systems for powder compounding, yielding an annual capacity of 50,000 metric tons.
Raw Material Traceability: Virgin acrylic emulsions sourced with fixed solid-polymer ratios; Portland cement conforming to ASTM C150 Type I / EN 197-1 CEM I standards.
In-House & Third-Party Quality Verification: Each production batch undergoes rigorous testing prior to release:Viscosity and density checks for liquid components.Particle size distribution and flowability tests for dry powder blends.
Packaging & Storage
Standard Packaging:
Kit Form: 20 kg pail (Component A: 10 kg liquid + Component B: 10 kg powder) or 35 kg kit.
Bulk Form: Industrial IBC tanks for liquid polymers and 25 kg valve-pocket bags for powder.
Shelf Life: 12 months from manufacture date when stored in unopened, original containers.
Storage Conditions: Store in dry, indoor conditions between +5°C and +35°C. Protect liquid component from freezing and direct solar radiation.
FAQ
Q: Can JS waterproof coating be applied to green (un-cured) concrete?
A: Yes, concrete must be at least 7 days old, structurally sound, and free of standing water or surface laitance. Surface moisture can be damp, but no pooling water is permitted.
Q: What is the recoating time between layers?
A: Typically 4 to 8 hours at 20°C, depending on relative humidity and ventilation. Ensure the previous layer is tack-free and firm before applying the subsequent layer in a perpendicular direction.
Q: Is this product compatible with cementitious tile adhesives?
A: Yes. The rough texture of the cured JS coating provides mechanical keying for polymer-modified tile adhesives (ISO 13007 / ANSI A118.4).
Q: What international certifications accompany export shipments?
A: All shipments are backed by ISO 9001 factory production control, comprehensive batch-specific CoAs, SDS complying with GHS standards, and optional SGS/third-party compliance verification upon contract confirmation.
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