Substrates must be clean, dry, stable and free from dust, grease or other contaminants prior to application. Surfaces should be flat, and any cracks or imperfections should be repaired before the plaster is applied. On very smooth or low-porosity substrates, a bonding primer may be required to improve adhesion, while heterogeneous surfaces may require a suitable primer to ensure uniform absorption. The plaster should be mixed until a smooth, homogeneous consistency is achieved and applied in thin layers of approximately 1-3 mm using a spatula or trowel, depending on the desired finish. Application should take place at temperatures between 5°C and 30°C, avoiding unsuitable environmental conditions during curing.