Cekol GS-150 EXTRA gypsum plaster

  • Excellent underlayment
  • For wet processing
  • Layer thickness up to 10 mm
  • Easy to process
Cekol GS-150

Application and properties

• CEKOL GS-150 is used for patching and smoothing walls and ceilings inside buildings.
• It serves as an excellent primer for finishing coats such as CEKOL C-45 Finisz.
• It is a compound of synthetic gypsum, mineral fillers and modifiers.

Instructions for use

Preparation of the substrate

Using a spatula, remove the remains of emulsion and oil paints, and loose grains of sand. The substrate should be clean, tight and free of grease.


Highly absorbent substrates should be primed with a deep penetrating primer CEKOL DL-80. Smooth substrates and substrates with low water absorption, as well as in the case of wet smoothing, must be primed with CEKOL GB-87 adhesion-increasing preparation.

Preparation of the mortar

The mortar should be prepared by pouring 1 kg of powder to 0.45 l of water (about 8 litres per 18 kg bag) and mixing it thoroughly.


The product should be applied to the surface, using tools made of stainless steel or plastic, or mechanically with suitable machines. The mortar should be used within 60 minutes. Layer thickness 1-10 mm. Capacity: ~1.5 kg/m2/mm. Working temperature: +5 ÷ +25°C.

Further works

After the initial hardening, it is possible to make adjustments using a sanding screen or sandpaper. Further works can be started when the coat is fully dry.

Technical data

  • Meets requirements EN 13279-1 – B2/20/2 Gypsum plaster
  • Proportions of the mixture 0.45 l of water for 1 kg of dry powder
  • The mortar should be used within 60 minutes
  • Layer thickness 1-10 mm
  • Working temperature +5 ÷ +25°C
  • Beginning of bonding ≥60 min
  • Flexural strength ≥2 N/mm2
  • Compression strength ≥4 N/mm2
  • Adhesion to substrate ≥0.5 N/mm2
  • Reaction to fire A1
  • The product has a hygienic approval

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