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bulgarian english

Derztek – Light Joint Filler

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Satentek

  • DERZTEK is a joint compound which is used at ALLEV plasterboard joint tapes.
  • DERZTEK‘s application is easy.
  • DERZTEK is easy-to-mix.
  • Special additives in its structure, retard the absorption of the DERZTEK mortar water by the plasterboard surface.
  • Besides its filling function, DERZTEK also forms a smooth surface as a result of its special grain-size distribution.
  • It has a high adherence property.
  • No cracks will occur at the joints as DERZTEK has a good flexibility. Also, the applied surface behave monolithically.

METHOD OF APPLICATION.

  • Surface must be cleaned before the application;
  • Put some water in a clean bowl. Sprinkle DERZTEK until it covers the water surface. Wait for a few minutes, then mix the mortar until a homogeneous mixture is achieved. After mixing, the mortar is ready to use. The mortar in the bowl can be used for approximately 1 hour.
  • For the application, use steel spatula in two phases.
  • Apply abundantly the first layer of DERZTEK, through the width of spatula, on the jointing tape that is firmly pressed just at the centers plasterboard joints.
  • Wait at least 2 hour for the setting of the first layer. Before applying the second layer, scrape off the residues on the surface with spatula.
  • Apply the second layer approximately 20 cm wide, as aligned with ALLEV plasterboard surface.

RECOMMENDATIONS

  • Never mix DERZTEK with any other product or material;
  • Use low-speed mechanical mixer;
  • Do not add any water or plaster to the mortar after mixing;
  • Do not use DERZTEK in temperatures below +50C;
  • Pre-filling should be done to the joints that are wider than 3mm;

STORAGE CONDITIONS

  • Bags should be store in dry places and should not be stacked in more than 15 layers;
  • Direct contract with ground and moisture must be avoided;
  • Using DERZTEK within one year after the date of production is recommended. Poor or over-long storage may deteriorate the physical properties of DERZTEK.

TECHNICAL SPECIFICATIONS

Water / Plaster ratio 6 – 6,5 lt water to 10kg DERZTEK
Workability 60 minutes
Final setting time 130 minutes
Pass 160 micron sieve (minimum) % 99,5
Pass 45 micron sieve (minimum) % 80
Bulk density (powder) 800 kg/m3
Surface hardness 40 SHORE D

PACKAGING

Type
Polypropylene laminated bags
Kraft bags
Weight
25 kg ± % 2
15kg ± 2%
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