Cementitious waterproofing

JS polymer cement waterproof coating

The JS waterproof coating specified across Asia and Africa. It bridges hairline cracks and goes onto damp concrete — which is most concrete in the tropics.

Flexible, water-based, and happy on damp substrates

Family: Cementitious waterproofing
Common packaging: Liquid + powder set; packaging made to your order
Standards: GB/T 23445-2025

Product types and options

Type I — flexible
Type II
Type III
Table ranges span Types I–III, not a single type

Where it is used

Roofs and exterior walls
Bathrooms under tile
Below-grade works

Why this line sells

Applies to damp substrates without a primer
Water-based and low odour
Liquid and powder ship separately, so freight is cheap

Typical values

Solids content: ≥ 70%
Tensile strength: 1.2–1.8 MPa
Elongation at break: 80–200%
Impermeability: 0.3 MPa · 30 min
Bond strength: 0.5–1.0 MPa

Standards

GB/T 23445-2025

Typical values against the referenced standards. Actual values are shown on the test report issued for each batch, and specifications can be adjusted to local standards and customer requirements.

Third-party test report

Quality Supervision and Inspection Center of Synthetic Material Ageing of Chemical IndustryTL25020012 · GB/T 23445-2009 · Type Ⅱ · 2025All tested items pass
Guangdong Provincial Building Materials Product Quality Inspection CenterGD2025-12-00175 · GB/T 23445-2009 · Type Ⅱ · 2025-12-17All tested items pass

All test reports

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