
About the product
The Fassa Bortolo KX 16 W2 is an extra-white water-repellent bio-render base coat made from lime and hydraulic binder, for interior and exterior use. Formulated with hydrated lime, selected sands, and specific additives, it offers excellent resistance to humidity and good water vapor permeability, making it ideal for the protection and rehabilitation of facades while allowing the wall to breathe.
Which projects is it ideal for?
- ✓ Render base coat on brick, concrete blocks, and raw concrete
- ✓ Waterproof protection for facades and walls exposed to humidity
- ✓ Restoration and rehabilitation of facades, even on old substrates
- ✓ Interiors and exteriors where breathability and an extra-white finish are desired
Key Features
- ✓Water-repellent (class W2) — low capillary water absorption, keeps the wall dry
- ✓Breathable lime base — good vapor permeability, eco-compatible with old substrates
- ✓Extra-white — bright and uniform finish with selected raw materials
- ✓Versatile finish — floated, scraped, or smooth depending on the desired effect
- ✓Manual or machine application — compatible with plastering machines like FASSA, PFT or similar
- ✓Excellent yield — ≈ 15 kg/m² for every 10 mm of thickness
Technical Specifications
| Type | Water-repellent bio-render base coat, lime and hydraulic binder based |
| Composition | Hydrated lime, hydraulic binder, selected sands and additives |
| Classification | CSIV W2 (EN 998-1) |
| Color | Extra-white |
| Substrates | Brick, concrete blocks, raw concrete |
| Application | Manual or with plastering machine (FASSA, PFT or similar) |
| Thickness | Up to 20 mm per coat · max total 30 mm |
| Finish | Floated, scraped or smooth |
| Yield | ≈ 15 kg/m² for every 10 mm (one bag ≈ 1.7 m² at 10 mm) |
| Application temperature | Minimum recommended +5 °C |
| Use | Interior and exterior |
| Format | 25 kg bag (with moisture protection) |
Application and safety conditions
Protect fresh mortar from frost and rapid setting (minimum recommended temperature +5 °C). For thicknesses over 20 mm, apply in several coats, leaving a maximum of 4 hours between them. Ventilate the premises after application until completely dry and do not wet or retouch the product once applied (color discontinuities may appear). Alkaline product: contains lime/cement, irritating to skin and eyes — use gloves and eye protection. Always consult the official Fassa Bortolo technical and safety data sheet.
For a professional finish
Complete it with trowels and floats (plastic, wood or polyurethane) for smoothing, and with fiberglass mesh for double rendering on heterogeneous surfaces. It is part of the Fassa Bortolo range of renders and facade systems.



















