Weber Saint-Gobain - Official website of the company

webertherm glue

webertherm glue
webertherm glue

Product benefits

  • Polymer modified for high bond strenght.
  • Factory batched for consistency
  • Long shelf life

Adhesive of increased adhesion for fixing foamed polystyrene board for ETICS

webertherm glue is a pre-mixed dry blend of cement, fillers, polymer, and additives. It is mainly used as adhesive to fix rigid insulation to a variety of surfaces: masonry, brick, conrete , gypsum and cement board. It is resistant to mechanical stress and has an outstanding bonding effect and is water resistant.

Product Features


Appearance Powder
Composition Cement, siliceous sand and additives
Color Grey or White
Density 1.55 kg/lit. ± 0.05
Open Time 25 min. at 20°C
Pot Life 2 hrs at 20°C
Shelf Life 6 months
Mixing Ratio 6 lit. per 25 kg
Coverage 3 to 7 kg/m²
VOC and formaldehyde content ISO/FDIS 11890-2/GC-MS None (<10μg)

Tests and results

Tensile adhesion strength (N/MM2)ETAG 004:2000(1) webertherm glue/substrate webertherm glue / EPS
28 days standard conditions 0.26 0.08
28 days standard conditions + 2 days water immersion + 2 hours drying 0.34 0.1
28 days standard conditions + 2 days water immersion + 7 days drying 0.47 0.1



webertherm glue can be stored for 6 months in dry conditions, away from extreme temperatures and protected against wind.




Printable TDS (PDF)

Printable MSDS (PDF)


Send or download the documentation

You can either send the documentation to an email address, or download it.

Instructions for use

Surface preparation

Surface must be clean and free from greasy matters or dust

Product application

Apply the webertherm glue mixture on the back side of the insulation board (EPS). Apply the adhesive on the inside of the board using the “strip-point” method. It consists of preparation of continuous circumferential block (at least 3 cm wide) at the edge of the board and even distribution of 6 to 8 patches of 8 to 12 cm in diameter on the whole surface. Immediately after application of the mortar on the board, fix the board to the substrate by firm pressing and level it. In case of even and smooth substrates, the mortar can be evenly distributed using a notched float on the whole board surface to ensure 2 to 5 mm layer thickness. CAUTION: Immediately place the insulation board on the substrate, ensuring that no webertherm glue mixture gets into board joints. Do not allow the webertherm glue mixture to form a skin before positioning the insulation board on the substrate as it will affect the bond strength.
Joints between adjacent insulation boards should be reduced to the minimum.

Clean up

Clean the tools with water after use. Cured materials can only be removed mechanically.

Environmental and Safety

Safety precautions

The product contains cement powders which, when mixed with water, release alkalis that could be harmful to the skin. It is preferable that the application be done in a ventilated area, and to wear protective gear for hands, eyes and respiratory system and to avoid breathing of the dust. Splashes on the skin should be washed away by cleaning with soap and water. In case of contact with eyes, wash thoroughly with clean water. If swallowed, do not induce vomiting, in both cases seek medical attention. The product is non-flammable.


While the company guarantees its products against defective materials, the use and application of these products are made without guarantee since the conditions of their application are beyond its control. It is recommended to verify with the company that the product is suitable for the intended use, and that this Data Sheet version is the latest one. The company may modify it without prior notice. Technical characteristics are listed for guidance only. For more information, please contact the company’s office in your location.


The information included on this Technical Data Sheet is the sole property of SODAMCO Holding. The unauthorized disclosure, use, dissemination or copying (either whole or partial) of this data sheet or any information it contains, is prohibited and subject to legal pursuit.

Available packaging

Lebanon25 kg
Syria25 kg
Jordan25 kg
KSA25 kg
UAE25 kg
Qatar25 kg
Kuwait25 kg
Oman25 kg