Series 12 — HydroBlock
FlexShield Waterproof Coat
High-elongation polymer-cement waterproofing for kitchens, bathrooms and balconies.
A high-elastomeric polymer-cement (or single-/two-component polymer) waterproof coating engineered for residential wet zones and small commercial works. Designed for domestic kitchen, bathroom and balcony waterproofing at home, and humid-climate residential plus light-commercial projects abroad.
- Residential kitchens & bathrooms
- Balconies and roof terraces
- Humid-climate residential projects
- Small commercial wet-zone works
Why specify FlexShield
What this coating does that paint cannot.
High-elongation membrane
Elongation at break ≥300% — bridges hairline cracks and substrate movement that rigid waterproofing fails on.
Tested watertightness
0.3 MPa for 30 min with no leakage — meets residential and light-commercial waterproofing acceptance.
Finish-compatible
Bonds with tile adhesive, microcement and decorative coating systems — no awkward interface trades.
Predictable wet-zone trade
Fixed system thickness and coverage make take-off pricing and warranty terms predictable for project teams.
Standard Finishes
A starting palette of 2 colours.
All finishes are factory-tinted on order with lightfast natural mineral pigments. Custom colour matching available for project quantities ≥ 200 kg.
Technical Data
Full specification
| System | Polymer-cement or high-elastomeric polymer (1K / 2K) |
| Total system thickness | 1.5–2.0 mm |
| Coverage | 1.5–2.2 kg / m² (system) |
| Elongation at break | ≥ 300% |
| Watertightness | 0.3 MPa / 30 min, no leakage |
| Touch dry | 2–4 hours per coat |
| Recoat | 6–12 hours |
| Compatible top finishes | Tile adhesive, microcement, art coating |
| Substrate | Cement render, concrete, gypsum (with primer) |
| Application | Brush, roller or airless spray (multi-coat) |
Full TDS, SDS and EPD documents available on request to qualified buyers.
Packaging & SKUs
How it ships
18 kg pail (1K polymer)
20 kg AB kit (2K polymer-cement)
In Detail
About FlexShield Waterproof Coat
CALMURA FlexShield Waterproof Coat is a high-elasticity waterproofing membrane offered in either single-component polymer or two-component polymer-cement chemistry. System total thickness 1.5–2.0 mm, system coverage 1.5–2.2 kg/m², elongation at break ≥300% and watertightness 0.3 MPa for 30 minutes with no leakage. Compatible with subsequent tile, microcement or art-coating finishes — designed to reduce leakage callbacks and to support stable, multi-trade interior delivery.
Common Applications
- Bathroom floor and wall waterproofing
- Kitchen wet-zone backing
- Balcony and roof terrace waterproofing
- Light-commercial restroom and pantry zones
Bring FlexShield into your project.
Sample boards typically ship within 5 business days; project quotes within 24 hours.