Mortar Specialties

Cement Based Mortar

Monneli Neofil Block

Adhesive for Autoclaved Aerated Concrete Block

NEOFIL BLOCK can be used for laying internal and external AAC (Autoclaved Aerated Concrete) blocks and panels.
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Technical Information
Product Description

NEOFIL BLOCK is a powder adhesive composed of hydraulic binders, bonding agents, quartz, synthetic resins and special additives formulated to obtain, when mixed with water, optimal characteristics of workability and high adhesion power to the support. It contains neither asbestos fibre nor other materials considered harmful for health of the applicator.

  • Factory controlled pre-blend ensures consistent high quality
  • Requires only addition of water on site at the time of usage
  • Strong adhesion to AAC Blocks
  • Mineral based non-hazardous
Compiliance Standard
  • BS EN 998-2
  • ASTM C 270
  • ASTM C 150
  • ASTM C 144
Packaging, Coverage / Consumption

NEOFIL BLOCK is supplied in multilayered 50kg bags.

Consumption: 4 – 5 kg/ m².

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, white

Density at 25°C

1.5 kg/L

Compressive Strength

>4.0 N / mm2

Flexural Strength at 7 days

>1.5 N / mm2

Recommended thickness

3 mm

Noxiousity according to EEC 88/379



 >1.0 g/L

Application Information
Instructions for use


To prepare the mixture, pour in a container 10 to 10.5 Liters of clean water. Add a bag of 50 Kg of NEOFIL BLOCK, then mix to get a homogeneous lump free consistency mix.

Let the product rests for about 5 minutes and remix shortly before use.


Saturate the block surface with water before applying the adhesive mortar any excess water should be removed.

Place the first line of blocks on concrete slab using a traditional cement mortar.

Apply NEOFIL BLOCK with special toothed trowel and then position the blocks verifying their alignment. Remove possible excess of mortar before it hardens.

Ensure that the adhesive spread on the blocks has not formed a superficial film. In this case apply fresh mix with the toothed trowel.

NEOFIL BLOCK should be applied in a thin layer to enable the continuity of thermo-insulation of the blocks.

Leave a space of about 2 cm between the top of block wall and the bottom of slab or beam in order to avoid formation of cracks along the wall. This cavity should be filled with compressible material (see relative technical data sheets).

After full curing of the block wall, plastering may start using an appropriate plastering product such as RASANTE P20.


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


  • If the blocks are laid directly on a floor with possible humidity rising, it is recommended to apply a proper damp course system first
  • The 2 cm separation between the top of the block wall and the bottom of slab or beam should be filled with suitable compressible material
  • Spray the block wall with water before applying the plaster.
  • Ensure that the first layer of blocks is fixed proper with perfect alignment
  • Do not apply NEOFIL BLOCK in rainy weather, high winds and sand storms
  • Do not apply on surface that has temperature less than +5ºC
  • During summer season, working area should be covered to prevent the direct sun effects. Keep equipment cool and use a cool water
  • The product should not be exposed to moving water during application
Surface Preparation

The support, where NEOFIL BLOCK will be applied, must be perfectly clean, solid, compact and free from grease substances.

Additional Information
Health & Safety

NEOFIL BLOCK 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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