Mortar Specialties

Cement Based Mortar

Monneli Rasante P-20

Cementitious Dry Ready Mix Plaster

RASANTE P-20 is recommended for plastering on block walls, ceilings, bricks and concrete surfaces, it should not be used on painted surfaces.
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Technical Information
Product Description

RASANTE P-20 is a cement based ready mix plaster. It is specially formulated for exterior and interior plastering work to give a hard, smooth, and better shrinkage control base coat. Due to its high content of additives and the use of precisely graded fillers, a homogeneous, good adhesion, and high workability is obtained when mixed with water.

  • Fast mixing application using spray machine
  • Factory controlled pre-blend ensures consistent high quality
  • Requires only addition of water on site at the time of usage
  • Strong adhesion on variety of substrate
  • Shrinkage controlled, reduces surface cracks
  • Mineral based non-hazardous
  • VOC compliant
Compiliance Standard
  • BS 5262,5492
  • ASTM C 387
Packaging, Coverage / Consumption


RASANTE P-20 is supplied in 50kg multi-layered bags.



Approximately 15-16 kg per m² for 10 mm thickness.

Shelf Life & Storage


Store in dry covered place in the original closed bags. In these conditions, the product shelf life is 12 months from the date of production.

Technical Properties



Grey powder

Dry density

1.65 kg/L


4.59 g/L

Grain size

0-2.5 mm

Compression strength at 28 days (ASTM C579)

10 N/mm2

Flexural strength at 28 days (ASTM C580)

2.0 N/mm2

Chloride content (BS 812)


All values are subject to 5-10% tolerance

Application Information
Instructions for use

Surface preparation

The substrate should be free of loose particles, dust, dirt, grease, oil or paint. Absorbent and porous substrates should be moistened with water prior the application of RASANTE P-20.

In case of non absorbent surfaces, a spatter dash slurry coat DASHBOND or DASHBOND SPX (in case of AAC Block surface) should be applied as a key coat to improve adhesion and high bonding with the substrate.

In case of surface contains microsilica, DASHBOND SPX spatter dash slurry should be applied to improve adhesion with the substrate.
Concrete or block substrates should have been allowed to cure sufficiently. All shrinkage movements should taken place before applying RASANTE P-20.

Do not apply RASANTE P-20 on surface exposed to movement, vibration or mechanical impacts.
Saturate the surface with water and wait for the evaporation of excess water before applying the mix.


RASANTE P-20 should be mixed with clean water to obtain a homogeneous mixture free from lumps. One 50 Kg. bag of RASANTE P-20 should be mixed with about 8 – 9 Liters of clean water. The mixture remains workable for 1 hour after mixing (at 25ºC). Let the mix set for 5 minutes, then remix before application.


Apply RASANTE P-20 on the surface manually with a plastering trowel or by using a spraying machine in a single layer (up to 20mm).

When the plaster has "set", smooth finishing can be achieved with a wooden or foam float. The Float should be moistened during the smoothing operation.

If more thickness is required, the application should be done in two layers. In the first layer, apply RASANTE P-20 in a thickness of 10-15mm, a rough texture is to be obtained to provide mechanical Key for the second layer. The second layer should be applied at least 48 hours after the first layer. Within this period cure the plaster with clean water. Apply the second layer at a thickness of up to 20mm.

If applying with spray machine, RASANTE P-20 mix should not be allowed to stand unused in the machine for longer than 30 minutes.
In order to ensure proper curing, it is advisable to keep the plastered surface moist and protected from sun and wind during the first 48 hours.


Tools and equipment should be cleaned with water immediately after use. Hardened materials should be mechanically removed


  • No further water should be added to the mix. Hard and set plaster should not be re-mixed or used
  • Do not apply RASANTE P-20 onto gypsum, metallic and wooden supports
  • During summer season, working area should be covered to prevent the direct sun effects. Keep equipment cool and use cold water
  • The applied plaster has to be water cured for a period of 3 days
  • Before applying any kind of stucco finish, paint, or wall paper the plaster has to be allowed to dry out completely
  • Should not be applied on floors or on painted surfaces
Additional Information
Health & Safety

RASANTE P-20 is a cement based product. Avoid contact with eyes or skin.


During application, wear appropriate protective clothing, goggles, gloves and respiratory equipment if necessary.


In case of contact with skin, rinse with water and again wash thoroughly with soap and water.


In case of contact with eyes, rinse with plenty of water and seek medical advice accordingly.


If ingested, obtain medical attention immediately. Do not induce vomiting.

Important note

The information in this Technical Data Sheet is based on Colmef Monneli’s experience. Colmef Monneli does not accept any liability arising from the use of its products as it has no direct or continuous control over where or how its products are applied. All Colmef Monneli’s Data Sheets are updates on regular basis. It is the user’s responsibility to obtain the latest version.

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