USAGE INSTRUCTIONS
Surfaces to be sealed must be clean, dry and free from any dust, loose particles and oil stains. Non-porous surfaces should be cleaned with solvent and a clean, non-fluffy cotton cloth. Excess solvent should be removed with a clean cloth.
Open the bucket and stir the mixture. Do not dilute it!
It is recommended to apply the product in two layers. When applying the next layer, make the brush strokes in a different direction than previously. This will reinforce the mastic's structure. Depending on the surface porosity, the next layer can be applied approx. after 1 hour.
Sealing door and window joints:
Cover the adjacent surfaces with masking tape. Do not cover the edge of the window frame or doorjamb with the tape, mastic must be able to form an entirely air- and waterproof connection alongside the whole joint. Use a paint brush to apply the mastic in an even layer to the surface.
Sealing various penetrations:
A sealing cuff or reinforcement fabric must be used when sealing penetrations. Install the sealing cuff or reinforcement fabric and use a paint brush to apply the mastic in an even layer to the surface.
During curing process, make sure that sealed surfaces stay clean and are not under mechanical stress.
Air&Vapour Membrane 660 Technical Data Sheet 
