Mortar Specialties

Gypsum Based Mortar

Monneli Neofil G12

Gypsum Board Adhesive

NEOFIL G12 is used for internal applications for fixing gypsum board panels on walls. It can be applied on all type of cement substrates in buildings. It can also be used for spot bonding insulation material as expanded polystyrene, cellular polyurethane, acoustic boards, rock-wool, etc.
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Technical Information
Product Description

NEOFIL G12 is a grey colour powder adhesive composed of cement, filler, synthetic resins and special additives formulated in a way to obtain an excellent characteristics of workability and adhesion. It is water resistant and does not contain fiber, asbestos or any other harmful components.

  • Excellent adhesion strength
  • Ecofriendly
Packaging, Coverage / Consumption

NEOFIL G12 is supplied in 25 kg bags.

Consumption: From 3 - 6 kg/ m²

Shelf Life & Storage

Store in dry covered place in the original closed bags. In these conditions, the product shelf life is 9 months from the date of production.

Technical Properties




Density at 25°C

1.4 kg/L

Max. time for application at 25 °C. and 60% humidity

45 minutes

Service Temperature

–5°C to +80°C



Noxiousity L.88/379 CEE


Application Information
Instructions for use


Add NEOFIL G12 bag of 25 kg into a container of 5 - 5.5 liters of water (or PVA LATEX RIPRESA as needed); mix until a uniform, lump free consistency mix is achieved. For mixing process, a slow speed drill (200 – 300 rpm) fitted with a suitable paddle is recommended.

Keep the obtained mix for about 5 minutes and then remix before application.


Apply the mixed product on the whole surface of the back of the gypsum board panel with a notched trowel, or a strip around back edge of the panel depending on panel size.

Large size panels must be bonded over the whole surface with notched trowel. Small size panels can be bonded by applying a strip of spots of the adhesive on the reverse side of the board. The adhesive strip should be applied all around the board, as well as, in the middle.

Apply sufficient pressure on the board during fixing in order to ensure good contact with the adhesive. Check the level of the board and adjust immediately after fixing the panel.


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


  • The allowed temperature of application is from + 5 °C - + 35 °C
  • Do not use NEOFIL G12 to bond gypsum boards on metal, non-absorbent surfaces or on substrate subject to strong movement such as wood, asbestos, cement, etc.
  • Do not bond gypsum board panels on damaged substrates. In this case always secure the panels by adding mechanical fixing at the edges and in the centre
Surface Preparation

All surfaces must be sound, dry, compact, free from dust, grease substances and inconsistent parts.

Concrete or block supports should have been allowed to cure sufficiently. All shrinkage movements should take place before fixing the gypsum board.

In case of applications on walls exposed to temperature variations, applications where some elasticity is required or bonding to high absorbent substrates then NEOFIL G12 should be mixed with PVA LATEX RIPRESA as a total or partial substitute of the mixing water.

Additional Information
Health & Safety

NEOFIL G12 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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