Izogreen Technology
Izonil Waterproof Plaster
Industrially dry-mixed 100% waterproof breathable plastering mortar with dehumidifying ability — based on Portland cement, silica sand, the unique natural admixture (Izocomponent) and reinforced with PP fibres. For external/internal and positive/negative application as a one-step replacement for general-purpose plastering mortars, renovation plastering mortars and diffusion-closed waterproof membranes.
Description
100% waterproof plastering mortar (resistant against water pressure of 1 BAR / 0.1 MPa with water penetration less than 1 mm) and dehumidifying plastering mortar (with high volume of micropores allowing permanent dehumidifying of wet substrates). Meets the requirements of EN 998-1 as renovation plaster. Provides a long-term solution to water penetration and ventilation/drying of wet walls. Contains no harmful or toxic ingredients — suitable for direct contact with drinking water.
Surface preparation
Designed for vertical substrates (brick, light concrete block, rough concrete) and horizontal substrates (concrete floors and roofs). The substrate must be solid, free of dirt, oil, grease, dust, paint and loose parts. Moisten thoroughly immediately before applying the fresh plaster mixture, then apply a thin Portland-cement adhesive bridge a few millimetres thick. Apply the plaster before the cement bridge hardens.
Mixing
Use a gravity mixer or hand-held electric mixer. Add water first — 4.0–4.7 litres per 25 kg of dry plaster. Gravity mixer: add water, then powder, mix for at least 10 minutes. Hand-held: add water, then powder, mix for 5 minutes; rest 5 minutes; mix again for 1 minute. Use within 3 hours.
Application
Apply manually with standard plastering tools or by plastering machine pump. Use a 5×5 mm fibreglass mesh (~145 g/m²) at corners, joints, around windows and doors — or across the whole area. Up to 3 layers, total thickness max 30 mm. One layer is 10–15 mm. Apply each new layer at least 24 hours after the previous one. Apply at +5 °C to +25 °C; protect from rain for 24 hours; do not apply in direct sun, strong wind or freezing weather.
Cleaning & care
Clean tools with water before the plaster hardens. Hardened material can only be removed mechanically. Protect freshly applied plaster from rapid drying for at least 48 hours.
Final coating
Let plaster dry for at least 3 weeks before final coating. Use highly breathable / diffusion-open paints (silicate, cement or lime paints). For tile finishes, roughen the surface, use standard tile adhesive, and grout with breathable grout to preserve breathability.
Advantages
- World-unique plastering mortar — simultaneously 100% waterproof, breathable and dehumidifying
- Resistant to penetration of rain water and running water
- Resistant to water under pressure up to 1 BAR (EN 12390-8 — penetration < 1 mm in 72 h)
- Meets EN 998-1 for general-purpose AND renovation plastering mortar simultaneously
- Highly breathable — low water-vapour diffusion coefficient
- Excellent adhesion; minimal waste during application
- Resistant to salt crystallisation; sulphur-resistant
- Applicable on damp surfaces, manually or by plastering machine
- Above-ground & underground; externally & internally; positive & negative side
- Non-toxic — suitable for direct contact with drinking water
Technical Data Sheet
| Property | Specification |
|---|---|
| Appearance / colour | Powder / grey |
| Chemical composition | Silica sand, Portland cement, natural Izocomponent, PP fibres |
| Silica sand particle size | 0–0.6 mm (Soft) · 0–2 mm (Rough) |
| Packaging | 25 kg paper bag |
| Shelf life | Minimum 18 months |
| Water / powder ratio | 4.0–4.7 L water per 25 kg dry plaster |
| Pot life / workability | Min. 3 hours at 20 °C |
| Layer thickness | One layer 10–15 mm; max 3 layers totalling 30 mm |
| Coverage | At 10 mm: 12.5 kg/m² (25 kg = 2 m²) · At 20 mm: 25 kg/m² (25 kg = 1 m²) |