The product may be applied on all typical interior surfaces: gypsum, cement plasters, and lime plasters, gypsum blocks, concrete, aerated concrete, plasterboards and durable paint emulsion, phthalic and oil coatings, provided the surface is stable, clean and dry. The surface should be stable, clean, free of grease, soot, flaking and unstable paint coatings (cleaning with water under pressure or detergents). Wetting of the substrate is not recommended as it reduces the adhesion of the product. No priming is necessary. If the substrate stability is uncertain, it is recommended to use the ŚMIG K-15 Universal Primer.

The product should be mixed with water (0.4 l of water per 1 kg of product) and mixed with a slow mixer and agitator suitable for gypsum finish. During preparation, use clean, preferably potable water. Put product into water, never the other way round. Mix until you reach uniform mass of desired density. After 2-3 minutes, the mixture is ready for use. Too thin or too dense mortar may be corrected during the initial 10 minutes by adding the dry product or water and mixing. To prepare mortar, use stainless containers free from any remains of solidified gypsum. 

Apply mechanically or manually using clean stainless steel tools. It is recommended to fill larger cavities before applying the product to a larger surface. Working temperature ranges between +5 and +30°C.

It involves putting one or two layers of wet finish and sanding unevenness after drying. Initial sanding with 80-120 grit sand paper or mesh. Final grinding with 180-240 grit sand paper or mesh. If the first layer is not even, it is recommended to add the product locally or apply its thinner layer. Before applying another layer and before painting, it is essential to remove dust from the surface or to bond it to the surface. When removing dust, use clean brushes and the ŚMIG K-15 Universal Primer. Primer must be applied using a paint roller or a spray gun. After removing dust or drying of the primer, the smooth surface is ready for painting.