Morcem® Pasta Juntas lista al uso

Ready-mix material for the complete joint treatment in plasterboard systems.

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Additional information


Product based on of inorganic mineral loads, calcium sulphate and additives

Features and applications

  • Application with jointing tape for complete joint treatment (filling and finishing) in plasterboard systems. 
  • Plastering over screw heads.
  • Forms a smooth and flat surface.
  • Drying period between 12 and 48 hours depending on the environmental conditions.
  • Prepares the surface for decoration works
  • Reparation of areas that may have sustained minor damaged during installation or to correct slight irregularities in the boards.
  • Easy and comfortable to use
  • Easily cleaned.
  • Manual or mechanical application.
  • Not suitable for tapeless joints treatments.

Features and applications

  • Slightly mix MORCEM PASTA JUNTAS LISTA AL USO, prior to the use to to obtain a homogeneous consistency, either manually or mechanically. In the latter case, the stirring time should not exceed 30 sg.
  • Fill the joints with the paste and apply the jointing tape.
  • Flatten with a spatula and remove the excess. Remove any lumps, bulges or air pockets under the tape.
  • Leave until it is completely dry. Apply successive layers of paste according to the required level of finish, complying with the drying period between layers.
  • Apply 2 to 3 layers of paste on screw heads.
  • Use edge protectors and joint tapes on corners.
  • Each coat should be a slightly wider than the previous one.
  • Apply the decoration layer after the treatment of the joints ensuring that the applied paste is completely dry, free of dust and clean.
  • Water absorption of the boards and the paste must be regulated before the finish layer using a primer or plaster recommended by the manufacturer.


  • Laminated plasterboards.
  • The supports should be resistant, stable, healthy and clean, free of dust, remnants of release agents, organic products, etc.

Cautions and recommendations

  • Do not apply below 5ºC nor above 30ºC.
  • It should not be applied in cases above 85 % of humidity.
  • In case of high humidity levels, the use of dehumidifiers may be required.
  • It is necessary to comply with the drying times between layers to avoid shrinkage and cracks.
  • Longer mixture times can lead to loss of consistency and difficulty during application.
  • Do not use tools with remnants from other mixtures.
  • Do not mix with other products.
  • Do not apply or mix the product when there is risk of frost.
  • Icy temperatures or high relative humidity can reduce the adhesion of the paste.
  • The area in which the product is going to be applied should be sufficiently ventilated, to avoid excess humidity.
  • Not suitable for tapeless joint treatment.
  • Do not mix with any other paste or products.



5 and 20 kg containers
Shelf life: 1 year in sealed original packaging, sheltered from weather conditions and humidity.

Technical data

Color  White
Setting Time 12-48 hours.
Type of application Manual or mechanical
PH Approx. 8.5
Adherence (Mpa) ≥ 0.25**
Resistance to fire A2-S1, d0
Application regulations/standards Classified as 3A according to EN-13963.
Approximate performance* 1 COAT FINISH 0,50 Kg/m2
2 COATS FINISH  0,65 Kg/m2
3 COATS FINISH 0,75 Kg/m2

* Approximate consumption by m2 of finely adjusted edges, without taking into account peripheral joints or waste.


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.