K11 Flexible Polymer-Modified Cementitious Waterproofing Coating | Brush-Applied Crack-Bridging Protection
K11 Flexible Polymer-Modified Cementitious Waterproofing Coating
K11 Flexible is a two-component, polymer-modified cementitious waterproofing coating that forms a flexible, seamless membrane with excellent crack-bridging properties. Ideal for internal and external wet areas, concrete structures, and masonry surfaces where movement and vibration are expected.
Key Advantages
Superior Flexibility & Crack Bridging
- Elongation ≥250%, accommodates minor substrate movement
- Bridges dynamic cracks up to 1.5mm
- Resists vibration and thermal expansion
Polymer-Modified Dual-Component Formula
- Combines organic flexibility with inorganic durability
- Forms a chemical bond with concrete, becoming part of the structure
- Rigid yet flexible protection system
Versatile Application
- Suitable for both interior and exterior wet areas
- Can be applied on both positive and negative sides
- Applicable on damp substrates (no standing water)
Eco-Friendly & Certified
- Non-toxic, solvent-free, zero VOC
- Complies with green building standards
- Safe for potable water contact (with relevant certification)
Technical Specifications
| Property | Specification |
|---|---|
| Product Type | Two-component polymer-modified cementitious coating |
| Mix Ratio | Liquid:Powder = 1:2.5 (by weight) |
| Color | Grey (standard), White (optional) |
| Coverage | Approx. 1.8-2.2 kg/m² (2 coats, 1.2mm thickness) |
| Elongation | ≥250% |
| Adhesion Strength | ≥1.2 MPa (to concrete) |
| Water Impermeability | ≥1.5 MPa (negative side) |
| Application Temperature | 5°C to 35°C |
| Touch Dry | ~4 hours (at 20°C) |
| Full Cure | 7 days (ready for immersion) |
Applications
Interior Waterproofing
- Bathrooms, kitchens, balconies
- Basement walls, underground parking
- Water tanks, swimming pools, treatment tanks
Exterior Waterproofing
- External wall waterproofing
- Roof terraces, podium decks, planter boxes
- Tunnels, bridges, culverts
Special Applications
- Waterproofing of concrete joints
- Pipe penetrations, expansion joints
- Leak repair and waterproof reinforcement
FAQs
Q: Can it be applied directly over tiles?
A: Not recommended. Remove tiles to solid substrate or use bonding agent.
Q: How long before tiling?
A: Full cure in 7 days, but tiling can proceed after 48 hours (avoid sharp impact).
Q: Suitable for wooden surfaces?
A: No. Designed for concrete, mortar, brick and masonry surfaces.
Q: Shelf life?
A: 12 months in unopened original packaging, stored cool and dry.
Packaging
Standard Kit: 20kg (8kg liquid + 12kg powder), covers 10-12m² (2 coats)
Bulk: Liquid 20kg/drum, Powder 30kg/bag
Sample Kit: 2kg kit available for testing
Certifications
Complies with JC/T 2090-2011 polymer cement waterproof coating standard
Tested by National Building Materials Test Center
Meets green building material requirements
Potable water contact approval for specific grades