Description
S4Plaster AG 21 is a high-performance, ready-to-use acrylic emulsion-based decorative plaster, designed to provide excellent bonding strength and durability. It is ideal for both interior and exterior facades, providing a grainy finish that enhances the aesthetic appeal of buildings. This plaster is water repellent, resistant to external effects, and allows the surface to breathe, making it ideal for various construction applications.
✅ Advantages:
- Easy and fast to apply
- Provides a decorative appearance
- Permeable to water vapor, allowing the surface to breathe
- Resistant to external effects and water
- Water repellent properties
- Can be overpainted
- Lightweight, reducing the load on the structure
📌 Application Areas:
- On exteriors
- On vertical surfaces
- On sheathing systems and cement-based plasters
- On exposed concrete and gas concrete surfaces (after primer application)
⚙️ Technical Specifications:
| Property | Value |
|---|---|
| Chemical Structure | Colored acrylic emulsion |
| Density | ~1.56 g/cm³ (±0.1) |
| Grain Size | S3 (ISO EN 787-18) |
| Water Mixing Ratio | 6.50–7.00 L water / 25 kg powder |
| Compressive Strength (EN 1015-11) | ≥ 6.0 N/mm² |
| Bond Strength (EN 1015-12) | ≥ 0.5 N/mm² |
| Capillary Water Absorption (TS EN 1015-18) | ≤ 0.4 kg/m²·min0.5 |
| Water Vapor Permeability (TS EN 1015-19) | ≤ 15 |
| Thermal Conductivity (TS EN 1745) | 0.55 W/mK |
| Pot Life | Up to 2 hours |
| Full Drying Time | 1–2 days |
| Consumption | 2.40–2.60 kg/m² (for 1 mm thickness) |
🛠️ Application Instructions:
- Ensure the surface is clean, smooth, and solid
- Mix thoroughly before application
- Apply with a steel or plastic trowel to achieve even thickness
- Pattern the surface by making circular movements with a plastic trowel while the material is still wet
⚠️ Warnings:
- Do not apply in weather conditions below +5°C or above +30°C
- Avoid application on hot surfaces
- Do not apply on wet or frozen surfaces
- Ensure the surface is fully prepared and primed before application
🧽 Cleaning & Storage:
- Clean tools with water immediately after use
- Store in a dry, moisture-free area, unopened, for up to 12 months
🧯 Safety:
- Wear protective clothing, gloves, and masks during application
- Avoid contact with eyes and skin
- Keep out of reach of children
- Consult the Safety Data Sheet (SDS) for more details





