JS Cementitious Waterproof Coating Manufacturer - 10yr Proven

BOSLAI JS Cementitious Waterproof Coating (JS Waterproof Coating) is a two-component polymer waterproof coating. The liquid component consists of polyacrylate emulsion and other copolymer emulsions, while the powder component is composed of cement powder, quartz sand, and other inorganic powders. This coating has high waterproofing, durability, and impermeability. It adheres strongly to cement.

The ratio of liquid to powder is 1:2. The color can be customized. This product can be applied by brush or spray.This product cannot be exposed and requires a layer of concrete top to be applied over it.

Double-component / Eco friendly / OEM Accepted / Can be brushed and sprayed / Cost Effective

JS Polymer Cementitious Waterproof Coating

Where Can BOSLAI JS Cementitious Waterproof Coating Be Applied?

1.Building Surfaces: Roofs, walls.

2.Indoor Spaces: Bathrooms, Warehouses, Kitchens.

3.Special Structures: Basements, Pools.

4.Infrastructure: Tunnels, Bridges, Reservoirs.

What Are the Packaging Options, Coverage Rates, and Warranty?

Specification:	18kg/pail or 50kg/pail
Appearance:	Two components, white liquid and gray powder, color can be customized.
Coverage:	It is recommended to apply two coats, with each pail covering 13~15m².
Warranty period:	Normal Quality: 6~8 years. Excellent Quality: more than 10 years.
Shelf Life:	1 Year

What Are the Technical Specifications?

Item	Data
Setting Time (Initial Setting)	9.5h
Setting Time (Final Setting)	11h 45min
Permeability Pressure, 7d	1.0 MPa
Permeability Pressure, 28 d	1.5 MPa
Permeability Strength 28 d	29.3 MPa
Flexural Strength 28 d	9.4 MPa
Compressive Flexural Ratio	2.2
Adhesion Strength, 7 d	1.2 MPa
Adhesion Strength, 28 d	1.5 MPa
Alkali ResistanceSaturated Ca(OH)2 solution, 168h	No cracking or peeling
Heat Resistance(100°C water, 5h)	No cracking or peeling
Freeze Resistance – Freeze-thaw Cycle(-15°C ~ +20°C), 25 cycles	No cracking or peeling
Shrinkage Rate，28d	0.09%

TDS_JS Polymer Cementitious Waterproof Coating

TDS-JS Polymer Cementitious Waterproof Coating 下载

What are the key features and advantages of BOSLAI Modified Bitumen Waterproof Coating?

BOSLAI water-based polyurethane waterproof coating offers 6 core advantages that make it versatile for both indoor and outdoor applications:

Strong Adhesion: The bonding strength with cement-based surfaces can reach over 0.8 MPa, ensuring the stability and reliability of the waterproof layer.
Eco-friendly and Safe: Recognized as a green and environmentally friendly material, with stable performance, aging resistance, and non-toxic, harmless properties.
Efficient Film Formation: Excellent film-forming effect with fast curing speed, quickly forming a superior waterproof layer.
Convenient Construction: Easy to apply, can be directly applied on damp surfaces, and is not prone to bubble formation.
Cost-Effective: Simple construction process with low costs, and treated surfaces can accommodate additional coatings.

Customization Service

Customization is available for product color, packaging design, and package sizes.

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Contact us

Address

Building 12, Yun Chao Fu, Hangzhou City, Zhejiang Province, china.

Phone

+86 15231151892
+86 15906641341

info@boslaiwaterproof.com

FAQ

What is JS polymer cementitious waterproof coating?

JS polymer cementitious waterproof coating is a two-component waterproof material — liquid polyacrylate emulsion mixed with powder cement, quartz sand, and inorganic fillers at a 1:2 ratio. Once cured, it forms a highly adhesive, impermeable waterproof membrane that bonds strongly to concrete. It cannot be left exposed and requires a cement topping or tile layer over it.

Can JS cementitious waterproof coating be applied on damp surfaces?

Yes. This is a water-based product that can be applied on slightly damp cement substrates — just moisten the surface beforehand. No standing water should be present. This makes it practical for basements, bathrooms, and below-grade applications where achieving a fully dry surface is difficult.

Can JS waterproof coating be used for outdoor applications?

No. JS polymer cementitious waterproof coating is designed for covered applications only. It cannot be exposed to direct sunlight and must be covered with a cement topping (1.5–2.0 cm) or tiled over. For outdoor exposed waterproofing, consider BOSLAI metal roof waterproof coating or polymer modified bitumen waterproof coating instead.

What is the mixing ratio for JS cementitious waterproof coating?

The ratio is 1 part liquid to 2 parts powder, pre-measured in the pail — simply mix both components together. Use a mechanical mixer for about 5 minutes until smooth and lump-free. If dilution is needed, add water to the liquid first, then gradually add the powder while mixing. Apply within the working time after mixing.

How many coats are required and what is the coverage per pail?

At least two coats are recommended. Each 18kg pail covers approximately 13–15 m² per coat on standard cement surfaces. For high-stress areas like basements, tunnels, or water tanks, three coats are recommended with fiber mesh reinforcement at corners, joints, and pipe penetrations.

What are the key advantages of JS coating over other waterproof coatings?

(1) Adhesion strength reaches 1.5 MPa to cement at 28 days. (2) Can be applied on damp surfaces — no need to wait for full dryness. (3) Impermeability passes 1.5 MPa pressure at 28 days. (4) Resists alkali, heat (100°C), and 25 freeze-thaw cycles (-15°C ~ +20°C). (5) Cost-effective — simple application, low material cost. (6) Water-based, eco-friendly, non-toxic. Ideal for basements, bathrooms, kitchens, pools, and below-grade concrete structures.

How to find a reliable JS cementitious waterproof coating supplier?

Evaluate suppliers on five criteria: (1) TDS and specifications available before ordering. (2) Specialized waterproofing manufacturer with in-house formulation — not a general chemical trader. (3) Free sample support to test on your actual substrate. (4) OEM capability for custom packaging, color, and labeling. (5) Export experience with MSDS, dangerous goods classification, and customs documentation. At BOSLAI, we provide downloadable TDS, sample support, OEM customization, and export experience across Southeast Asia, the Middle East, Africa, and Europe.

A Reliable JS Waterproof Coating Factory with In-House Production

As a specialized JS waterproof coating factory, BOSLAI manufactures JS cementitious waterproof coating in-house — from raw material to finished pail. Unlike general traders, we control every batch: adhesion strength (1.5 MPa at 28 days), permeability resistance (1.5 MPa), and freeze-thaw durability. As a dedicated cementitious waterproofing supplier, we offer downloadable TDS, free samples for testing, and full OEM customization including private-label packaging, custom colors, and tailored formulations.

Trusted JS Waterproof Coating for Vietnam and Global Markets

BOSLAI JS waterproof coating is widely specified across Vietnam, where high humidity and monsoon rainfall demand reliable cement based waterproof coating for basements, bathrooms, and tiled roofs. We export to distributors and importers across Southeast Asia, the Middle East, Africa, and Europe — with MSDS documentation, dangerous goods classification, and freight forwarder coordination. Competitive factory pricing and flexible minimum order quantities help our partners grow their market share. Whether you supply construction material dealers or manage large-scale infrastructure projects, contact us for a sample and quotation.