Indoor Wet Areas
Primary waterproofing for bathrooms, kitchens, balconies, and laundry rooms before tiling.
Tianyuan JS Waterproof Coating Bucket
Coating Product Line Display
JS Waterproof Coating
Polymer Cement (JS) Waterproof Coating | Two-Component Flexible Slurry
High-performance two-component JS waterproof coating combining acrylic polymers and high-grade cement. Ideal for kitchens, bathrooms, and swimming pools with excellent wet-base adhesion.
Two-Component JS SlurryGB/T 23445-2009 StandardExcellent Wet-Base AdhesionJS I & JS II AvailableEco-Friendly & Non-ToxicOEM Support
Standard
GB/T 23445-2009
Send thickness, surface material, quantity, and destination port for a fast quote.
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Quick Specifications
Standard
GB/T 23445-2009
Product Type
Polymer Modified Cementitious Waterproofing Slurry
Grade Options
Type I (High Flexibility) / Type II (High Strength)
Packing Set
20kg Liquid Drum + 30kg Powder Bag (50kg total)
Mix Ratio (JS I)
Liquid : Powder = 1 : 1.2
Mix Ratio (JS II)
Liquid : Powder = 1 : 1.5
Curing Time
Surface dry: 4-8 hours; Full cure: 24-48 hours
Shelf Life
12 months in sealed original packaging
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Product Overview
Polymer Cement (JS) Waterproof Coating: The Flexible Shield for Modern Construction
Polymer Cement (JS) Waterproof Coating is a high-performance, two-component waterproofing material that combines the high elasticity of synthetic polymers with the excellent durability of cementitious materials.
Engineering Advantages of Tianyuan JS Coating
As a professional manufacturer in Shouguang, Tianyuan Waterproof has optimized this JS system for the most demanding project environments.
Core Applications
- Residential Interiors: The gold standard for waterproofing bathrooms, kitchens, balconies, and swimming pools before tile installation.
- Infrastructure & Civil Works: Permanent sealing for subway stations, tunnels, culverts, and highway bridge decks.
- Environmental Barrier: Non-toxic formulation makes it perfect for potable water tanks, wastewater treatment plants, and aquaculture ponds.
Quick Facts
Wet Substrate Friendly
Can be applied directly onto damp or wet base layers, significantly speeding up project timelines.
Superior Bond Strength
Forms a powerful molecular bond with concrete, masonry, and mortar surfaces, preventing delamination.
Eco-Friendly Barrier
Water-based, non-toxic, and solvent-free. Safe for drinking water reservoirs and indoor residential use.
High Crack Bridging
Maintains a flexible membrane that can accommodate minor structural movements and hair-line cracks.
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Applications
Underground Infrastructure
Reliable protection for basements, elevator pits, foundation walls, and subway tunnels.
Water Retaining Structures
Used for lining swimming pools, fire-fighting water tanks, and drinking water reservoirs.
Roofing Systems
Suitable for non-exposed roofing projects and as a detail reinforcement for complex roof shapes.
Bridge & Civil Works
Applied on bridge decks, culverts, and municipal civil engineering projects requiring flexible protection.
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Key Benefits
High Vertical Stability
Specially formulated to ensure no-sagging on vertical walls, maintaining a consistent dry film thickness.
Excellent Breathability
Allows water vapor to escape from the substrate while remaining completely impermeable to liquid water.
Customizable Colors
Available in standard white/grey, or customizable with pigments for easy multi-coat application monitoring.
Versatile Substrate Link
Compatible with wood, glass, plasterboard, foam, and even aged asphalt or SBS membrane surfaces.
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Technical Data
| Test Item | Unit | Test Method / Standard | Requirement / Class | Result / Notes |
|---|---|---|---|---|
| Tensile Strength | MPa | GB/T 23445 | Type I >= 1.2 | Type II >= 1.8 | Type I: 1.5 | Type II: 2.2 |
| Elongation at Break | % | GB/T 23445 | Type I >= 200 | Type II >= 80 | Type I: 230 | Type II: 110 |
| Adhesive Strength (Wet Base) | MPa | GB/T 23445 | Type I >= 0.5 | Type II >= 0.7 | Type I: 0.8 | Type II: 1.1 |
| Water Impermeability | 0.3MPa / 30min | GB/T 23445 | No Leakage | Passed |
| Low Temp Flexibility | degC | GB/T 23445 | Type I: -10 | Type II: No Crack | Type I: -10 Passed |
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
Clean the substrate from oil, dust, and loose debris. Pre-moisten dry concrete surfaces with water, but avoid standing water.
Mixing Instructions
Pour liquid into a mixing pail. Gradually add powder while stirring with an electric mixer for 3-5 minutes until lump-free.
Detailing Work
Apply a reinforced layer (with fiberglass mesh if needed) at corners, pipe penetrations, and joints before general coating.
Multi-Coat Application
Apply 2-3 coats using a brush or roller. Ensure the second coat is applied perpendicular to the first once it is touch-dry.
Curing & Protection
Allow at least 24 hours of air curing. Protect the surface from heavy rain or mechanical damage during the drying period.
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Packaging & OEM
Industrial Standard Set
Standard supply comes in a 50kg set: one 20kg plastic drum (Liquid) and one 30kg woven bag (Powder).
OEM & Branding
We offer private labeling and custom bucket designs for distributors and project-based bulk orders.
Pallet Loading
Rolls and drums are palletized and shrink-wrapped for safe international maritime shipping.
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Downloads
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FAQ
Is JS coating better than Polyurethane coating?
It depends on the application. JS coating is breathable and excels on wet substrates (like new concrete), making it ideal for indoor wet areas and basements. Polyurethane offers higher elongation and is better for exposed roofing.
How much JS coating do I need per square meter?
Typically, for a 1.5mm thickness, you will need approximately 2.0kg to 2.5kg of the mixed slurry per square meter across 2-3 coats.
Can I add water to the mixture?
Adding water is generally not recommended as it alters the polymer-to-cement ratio and can weaken the final waterproof film.
Can this be used for drinking water tanks?
Yes, our JS coating is non-toxic and environmentally friendly, meeting safety standards for use in drinking water reservoirs and aquaculture ponds.
Ready To Start Your Project?
Contact our team for competitive quotations and technical support.