Preparation of the application surface
The substrates for the FORTAX 6400 adhesive sealing must be clean and dry. Impurities such as dust, grease, oil, tar, bitumen and release agents like as surfactants and silicones must be removed. Sandy and rough surfaces may need to be pre-treated with the Gerband Primer 6300.
Apply the FORTAX® 6400 adhesive sealant with an 8mm thick bead on the fixed surface. Increase the sealant thickness where the surface is uneven.
In case of wet application
If ‘wet bonding’, the air-tightness-layer must be gently press down according to the DIN 4108-7 with a relief loop so that a 3-4 mm thick an adhesive seal layer is maintained.
In case of dry application
After a short drying time, pressure is required to ensure a strong bond to the airtightness layer.
Bonding of the airtightness layer
- The air-tightness-layer must be stress-free and fastened.
- Check that completed connections are secure.