Fine-grained filler MIKROSFERA

Lightweight fine-grained ready for use filler for smoothing of concrete, gypsum boards, plaster and other mineral surfaces before painting with water-based dispersion paints and wallpaper. Improves the sound and thermal insulation of walls. Recommended for the final finishing layer before painting. Requires no primer before painting.



  • Water-based
  • Ready to use in a variety of applications
  • Easy to apply and smooth up to 3 mm thick layer
  • Excellent vapor permeability, quick drying, no cracking, elastic
  • Low water absorption ensures lower paint consumption
  • Easy to sand, less dust
  • Lightweight, convenient to use and transport
  • Suitable for sustainable construction


Ready to use light fine-grained polymeric filler for interior use. For levelling concrete, plasterboard, plaster and other mineral surfaces before water-based paints and wallpaper. Recommended for both initial (on rough surfaces) and final smoothing.

The light fine-grained filler MIKROSFERA is suitable for manual application and MIKROSFERA S for spraying or rolling.

Work Tools: spatula, roller, airless spraying gun
Tool cleaning: with water
Application conditions: +10 oC to +25 oC and (35–80) % relative humidity
Coating thickness: 3 mm
Coverage rate: 1 m²/l for 1mm thick layer
Drying time (23°C, 50% RH): 1 mm dries in 3-4 hours and gains full strength in 28 days. Drying time depends on surface, layer thickness, air temperature and humidity, etc.

Technical data

Purpose: for interior use, dry areas
Binder: acrylic copolymer
Filler: dolomite, perlite
Solvent: water
Color: white, yellow white
Density g/cm3: ~1,0 EN ISO 2811-1
Particle size, mm: < 0,15
pH (20°C): 8,0 – 9,0
Quality standards and certificates: emission class M1 for building materials, CE marking EN 15824, EN 13963
VOC and SVOC: <0,5g/l/<0,5g/l EN ISO 11890-2
Formaldehyde concentration in filler: VdL-RL 03: 3 ppm or (3×10-4) %
Non–volatile–matter content, %: 48,0-50,0 EN ISO 3251
Reaction to fire: A2-s1,d0 EN 13501-1
Adhesion: MPa ≥0,3 EN 1542
Non-existence cracks: no cracks in the 50 mm zone from the end of the thin wedge EN 13963
Shelf life: tightly sealed packaging – 1 year from date of manufacture on the packaging

Packing: MIKROSFERA: 1l, 3l, 10l, 17l buckets, 17l bags
                MIKROSFERA S: 17l buckets, 17l bags

Surface preparation: the surface must be dry, capable of withstanding loads, stable and clean. Prime highly or un evenly absorbent surfaces with deep primer IGIS AG.

Filling: stir well before use. Apply the second layer only when the first layer is completely dry. Do not prime before painting, only remove the dust.

Application conditions: +10 oC to +25 oC and (35–80) % relative humidity
Coating thickness: 3 mm
Coverage rate: 1 m²/l for 1mm thick layer

Precautionary statements: keep out of reach of children, avoid release to the environment, wear protective gloves/ protective clothing/eye protective/face protective. IF ON SKIN: wash with plenty of soap and water. IF IN EYES: rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.

Additional hazard information: EUH208 – contains a mixture of 5-chlor-2-metil-2H-izotiazol-3-one and 2-metil-2H-izotiazol -3-one (3:1), 1,2-benzisothiazol-3(2H) -one, can cause allergy in humans.

Utilisation: do not pour into drains, water or soil. Empty, dry product package should be recycled or utilised according to national law.


Mikrosfera Product Data Sheet

Mikrosfera Declaration Of Performance

Mikrosfera Safety Data Sheet