Mortar Specialties

Cement Based Mortar

Monneli Rasante P-20F

Fibre Reinforced Cementitious Plaster

Block walls
Concrete surfaces
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Technical Information
Product Description

RASANTE P-20F is a single component, fibre reinforced 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, hydrated lime (ASTM C207, Type S), a homogeneous, good adhesion, and high workability is obtained when mixed with water.

RASANTE P-20F can be applied manually by hand or by using spray machines.

  • Excellent Adhesion strength
  • Fiber reinforced. Good crack resistance
  • Suitable for AAC blocks
  • Easy to mix, apply and finish
Compiliance Standard
  • BS 5262,5492
  • ASTM C 387
Packaging, Coverage / Consumption

RASANTE P-20F is supplied in 50kg bags

Consumption: Approximately 16-17 Kg. per m² for 10 mm thickness.

Shelf Life & Storage

Keep the product in its original bag and store in dry, covered place. In these conditions it can be stored for 12 months.

Technical Properties




Dry density at 25°C

1.65 kg/L

Grain size

0 – 2.5 mm

Adhesion to surface

>0.35 N / mm²

Compressive strength at 28 days (ASTM C579)

8 N / mm²

Flexural strength at 28 days

2.0 N / mm²

Application Information
Instructions for use


RASANTE P-20 F should be mixed with clean water to obtain a homogeneous mixture free from lumps. One 50 Kg bag of RASANTE P-20 F 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-20F on the surface manually with a plastering trowel or by using a spraying machine in a single layer not exceeding 20mm thickness.

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-20F 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-20F 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-20F onto gypsum, metallic and wooden supports
  • Do not apply RASANTE P-20F on surface exposed to movement, vibration or mechanical impacts
  • 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
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-20F.

In case of non absorbent surfaces, a spatter dash slurry coat DASHBOND 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 take place before applying RASANTE P-20F.

Saturate the surface with water and wait for the evaporation of excess water before applying the mix.

Additional Information
Health & Safety

RASANTE P-20F is a cement based product.


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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