Vetotherm Flex

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. 

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

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

Add 6.5-8 Liters (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 or 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 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.

Note: 

• 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. 
• When using Vetotherm Flex as a base coat or as a protective layer, the maximum allowable thickness is 3mm. 

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