Thermal Insulation Systems
Vetotherm Flex

Cementitious based adhesive and base coat for EIFS / ETICS

Expanded and extruded polystyrene and rock wool adhesive on cementitious substrates, masonry, and gypsum boards.
Fiber mesh reinforced base coat as part of EIFS / ETICS systems.
Ready to receive a wide range of decorative finishes.
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Technical Information
Product Description

Vetotherm Flex is a polymer-modified deformable cementitious adhesive specially designed for permanent fixing of thermal insulation boards to a wide range of substrates, including concrete and masonry. Vetotherm Flex is also designed for use as a protective mortar that provides a durable layer for insulation boards suitable for several decorative finishes.

  • Single component easy to apply.
  • Water-resistant.
  • Thixotropic, non-sag.
  • High physical and mechanical properties.
  • Deformable and impact resistant.
  • Requires no primer.
  • ETAG 004 requirements for ETICS / EIFS systems
  • ANSI/EIMA requirements for ETICS / EIFS systems
  • ISO 13007:2010 as C2TE S2
  • EN12004:2010 as C2TE S2
Packaging & Coverage

Vetotherm Flex is supplied in a 25kg Bag. 
Coverage: 1.3 - 1.5 Kg/m2 / 1 mm Thickness

Stated consumption data are for general guidance. Actual consumption depends on the nature of the substrate, method of application, and wastage.

Shelf Life & Storage

The original sealed bag of Vetotherm Flex has a shelf life of 12 months, provided to store clear ground in a dry, shaded place below 23ºC.

Grey Powder
Application Information
Instructions for use


Apply Vetotherm Flex directly on concrete, cement plaster, and masonry. In the case of very porous substrates, spray water onto the surface before the application.


To ensure proper mixing, use a mechanically powered mixer or heavy-duty drill fitted with a suitable paddle.

Add 6.75 - 7.5 Liter  (for each 25 kg bag) of clean water to a clean container. Add the powder slowly to the water while mixing continuously with a low-speed mixer/ heavy-duty drill (400 - 600 rpm) fitted with a suitable mixing paddle. Continue mixing for 3 minutes until obtaining a uniform consistency.

Leave the mixture for 5 - 10 minutes to mature, then remix without adding additional water.


As an Adhesive

Apply the mortar in a strip around the insulation board with enough spots to ensure full coverage. In the case of a smooth or plastered substrate, employ the back buttering technique. Use a notched trowel to spread the mortar on the back of the insulation board.

As a Base Coat and Protective Layer

Apply the mortar over the fixed thermal insulation panels. Using an aluminum roll, embed the precut reinforcing mesh onto the freshly applied mortar until fully immersed in the Vetotherm Flex layer.

Smoothen the surface with a long flat trowel. Apply more than one Vetotherm Flex layer where it is needed. Use a double or triple reinforcement mesh.


Mesh strips have to be overlapped by approximately 10 cm.

This material is a thin bed adhesive and can not be applied for more than 10mm thickness.


Clean all tools immediately after finishing with water. Clean hardened materials mechanically.

Surface Preparation

All surfaces must be clean and free from oil, grease, or loose materials. The insulation board has to be fixed firmly by using Vetotherm adhesives and anchors.

Fill the large gaps between insulation boards with strips of insulation board to leave minimal gaps, or fill with PU foam of similar U-Value to the insulation boards.

Protect all the buildings by using PVC Vetotherm accessories unless otherwise is specified.


Mesh strips have to be overlapped by approximately 10cm.

This material is a thin bed adhesive and can not be applied for more than 10mm thickness.

Additional Information
Health & Sefety

Vetotherm Flex is highly alkaline; therefore, avoid direct contact with eyes or skin. It is recommended to use protective gloves and goggles during application. Wash any skin contact with soap & water. In case of eye irritation, immediately wash with a copious amount of clean cold water. Seek medical advice.

Vetotherm Flex is non-flammable.

For further information, please refer to the material safety data sheet.

Important note

Saveto endeavors to ensure that any advice, recommendations, information it may give is accurate and correct. It cannot accept any liability either directly or indirectly arising from the use of its products because it has no direct or continuous control over where or how its products are applied, whether or not following any advice, specification, recommendation, or information given by us. Saveto has the right to change any of the technical datasheets' specifications upon its discretion without prior notification.

Hard copies of TDSs are printed once or twice a year. In addition, our technical data sheets are continuously updated as per R&D improvements and new 3rd party testing; kindly refer to our website for the latest updated TDSs.

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Saudi Vetonit Co. Ltd. (SAVETO)
P.O. Box 52235 Riyadh 11563, KSA
Toll: (+966 11) 265 3334
Fax: (+966 11) 265 0936
800 124 9009
Fax: (+966 11) 265 0718