Morcem® Yeso Controlado

Slow setting plaster for manual application, suitable for coating interior ceilings and walls, over all types of substrates. Its working time is regulated during the manufacturing process, ensuring a reduced waiting period and greater working time, leading to high productivity and excellent finish quality with high mechanical strength. Thanks to its porous structure, it provides good acoustic insulation. It also controls humidity, for optimal comfort indoors. It is non-combustible and provides good fire resistance.

Download technical data sheet

Additional information

Features and applications

  • Quick, simple mixing system.
  • High mechanical strength.
  • Very easy to use.
  • High output due to its extended working time.
  • General masonry work.
  • Coating of walls and ceilings.
  • Filling and levelling of small holes.

Instructions for use

  • Sprinkle plaster powder onto the water until it no longer absorbs the water. Then mix plaster by hand to obtain a homogeneous paste. (water/plaster ratio = 0.8-1).
  • Once mixed, allow plaster to rest for about 10 to 15 minutes and start to plaster.
  • The working time is approximately 15-20 minutes (depending on the conditions of use), and the approximate re-plastering time is about 10 minutes. 
  • The thickness may vary between 1 and 2 cm.

Cautions and recommendations

  • Do not add any kind of additives that could alter the setting process or the final strength of the product.
  • Do not add water after letting the product rest, since this may affect the product's final strength.
  • Be sure to clean tools thoroughly prior to further batch mixing.
  • Facings must be free from dirt, saltpetre, and efflorescence to ensure perfect plaster adhesion.
  • Use clean water between 5°C and 40°C.
  • Ensure that there is adequate ventilation for an optimal drying process.


17 kg plastic-coated paper sacks.
Be sure to store this product in a dry place and protect it from moisture to preserve its properties.

Technical data

Water/Plaster Ratio 14-20 litres per sack
Initial set time 20 (+/-5 min.)
Final set time ≥35 minutes
Compressive strength ≥2 N/mm2
Flexural strength ≥2 N/mm2
Surface hardness ≥45 (u.ShoreC)
Output 2.2–1.8 m²/sack/thickness in cm ±5%

Note: Working times can vary depending on the water/plaster ratio, temperature, water pH, substrate type, mixing speed and time.


The instructions for use are given according to our tests and knowledge and do not imply any commitment by GRUPO PUMA nor free the consumer from the examination and verification of the products for their correct use. Claims must be accompanied by the original packaging to allow a proper traceability.

GRUPO PUMA is not responsible, in any case, for the application of its products or constructive solutions carried out by the application company or other parties involved in the process and / or execution of the work, limiting the responsibility of GRUPO PUMA exclusively to the damages directly attributable to the supplied products, individually or integrated in systems, due to failures in their manufacturing process.

In any case, the drafter of the work project, the technical management or the person responsible for the work, or collaterally the application company or other parties involved in the process and / or execution of the work, must ensure the suitability of the products addressing the characteristics of them, as well as the conditions, support and possible pathologies of the work in question.

The values obtained by GRUPO PUMAS's products or its constructive solutions that, as the case may be, are determined by the EN standards or any other regulation that applies to it in each case refers exclusively to the conditions specifically stipulated in said regulation and that are referred to, among others, to certain characteristics of the support, humidity and temperature conditions, etc. without being them required in the tests obtained under different conditions, all in accordance with the relevant regulation.