Applying PU topcoat
the finishing layer for microcement and Lavasteen.
The PU topcoat is the transparent finishing layer that makes microcement waterproof and Lavasteen easier to maintain. Here you can read how to correctly apply the 2-component PU for a durable result.
🛠️ APPLYING PU TOPCOAT (2-COMPONENT: A + B)
✅ 1. PREPARATION
- Check the substrate for:
- Dirt, dust, grease and loose particles
- Any primer layer present/fully dry
- Required materials:
- Mixing container, mixer (low speed)
- 2K-resistant pile roller / brush
- Safety equipment: gloves, goggles, mask
- Cleaning agent for tools
🧪 2. MIXING COMPONENTS
- Mixing ratio: A : B = 5 : 1 (volume ratio)
- Pour component B completely into component A
- Mix mechanically for 2–3 minutes until homogeneous
- Note: Avoid air entrapment
- Pot life (working time): approx. 60 min at 20°C
🎨 3. APPLYING THE TOPCOAT
- Apply evenly with roller (cross-rolling if necessary)
- Work wet-on-wet to prevent lap marks
- Coverage: ± 100 g/m²
- Avoid pooling or excessively thick layers
⏱️ 4. DRYING TIME & CURING
| Ambient temp. | Dust-dry | Recoatable | Fully cured |
|---|---|---|---|
| 20°C | 4 – 6 hours | 12 – 24 hours | 5 – 7 days |
- Protect from water & chemicals until fully cured
- Ensure adequate ventilation during curing
⚠️ 5. IMPORTANT NOTES
- Do not apply at temperatures < 10°C or relative humidity > 85%
- Clean tools immediately after use
- Dispose of residues in accordance with regulations
Applying PU Topcoat for Microcement in The Hague
Applying a PU topcoat is a crucial step for protecting microcement in The Hague, making floors, walls and other surfaces durable and wear-resistant. This finishing layer not only provides protection against yellowing and wear, but also enhances the aesthetic appearance of microcement and Lavasteen Seamless Floor surfaces. With proper preparation and application techniques, the PU topcoat ensures a long-lasting, professional result, ideal for both residential and commercial spaces in The Hague.
Before applying the PU topcoat, careful preparation of the substrate is essential. Check that the surface is free from dirt, dust, grease and loose particles. Ensure the primer layer is completely dry, which typically takes one day with good ventilation. Use a primer for 5 m² to guarantee optimal adhesion, especially for applications such as a microcement wall in bathrooms. Wear gloves, safety goggles and a mask during the process to work safely.
Mixing the PU topcoat requires precision. Combine component A and B in a volume ratio of 5:1 and mix mechanically for two to three minutes until a homogeneous mass is achieved. Avoid air entrapment by using a mixer on low speed. The pot life is approximately 60 minutes at 20°C, so work efficiently and do not mix more than necessary. This step is crucial for uniform application, especially on projects such as a microcement kitchen, where a consistent finish is desired.
When applying the topcoat, use a 2K-resistant pile roller and work wet-on-wet to prevent lap marks. Apply the layer evenly with a consumption of approximately 100 grams per square metre. Avoid pooling or excessively thick layers, as these may remain white after drying. A cross-rolling technique helps achieve an even, matte finish. For detailed instructions on applying microcement layers prior to the topcoat, consult our microcement guide.
The drying time of the PU topcoat varies depending on ambient temperature. At 20°C, the layer is dust-dry after 4 to 6 hours and can be recoated after 12 to 24 hours. Full loading is possible after 5 to 7 days, during which time the surface must be protected from water and chemicals. Ensure adequate ventilation during curing to optimise the process. This is particularly important for applications such as a Lavasteen shower floor, where waterproofing is essential.
To guarantee a perfect result, do not apply the topcoat at temperatures below 10°C or humidity above 85%. Clean tools immediately after use to prevent build-up of residue and dispose of leftover material in accordance with regulations. For those wishing to choose the right colour for the underlying microcement, our colour samples page offers a convenient way to assess shades such as Cement or Nude.
With the PU topcoat from Lavasteen, you give your project in The Hague a durable and professional finish. Our products are designed for straightforward application and long-lasting results, suitable for both DIY enthusiasts and professionals. For a complete overview of the application and required products, visit our PU topcoat application page. Order before 14:00 and receive your materials the same working day, so you can get started quickly.
Ready to start your project?
Request colour samples first, or submit your project to us directly.