Hints, tips and best practice when using Knauf Airless Finishes.
With the Knauf Airless range you can achieve up to 250m2 of finished application a day, with 2 operatives!
Application:
Prepare the joints & beads on walls and ceilings by bedding Knauf Joint Tape into Knauf Joint Filler Premium and ensure flush with the tapered edge.
Once dry, you are ready to apply the first coat of Knauf Airless to the walls and ceilings. You will notice that the new material is more fluid in the bag; this is normal.
When loading material into the hopper/tub, always open the bag from the handle end, as this will eliminate the possibility of cut plastic and/or dried material entering the hopper and blocking the nozzle tip/piston.
You may notice the material is more fluid than the old version.
Spray the first coat onto the substrate. When the initial sheen has changed to a matt appearance, typically after 1-2 minutes, the material is ready for levelling. After levelling, you will notice it pulls in and levels off naturally, reducing trowel lines and leading to an improved finish.
The material will appear to feel stiffer when you trowel compared to the old version; again this is normal. You may need to open your hand slightly when smoothing the material.
Once the first coat has dried, which is typically 12-24hrs*, the second coat may be applied. You can trowel immediately onto the second coat and level flat. The material will feel stiffer when levelling and you may need to open your hand a little when smoothing the material.
We recommend a touch test in the internal corners to ensure the material is dry.
Ventilation is key to aid the drying process and additional fans will enable this to happen if windows/doors cannot be opened. Due to the superior finish naturally achieved from our new formulation, the sanding requirements are much less, if needed at all!
If you do wish to sand to a finish then we recommend no greater than 180 grit for hand sanding, and no greater than 240 grit when using a flex type sander and vacuum.
Spray Machines:
Recommended machine – Graco Mk5 Pro & hopper with bag roller. When applying the new materials, you can drop down from a 535 tip to a 531 tip reducing the amount of material applied, giving a finer and more superior finish
You will notice the machines run quieter and pressure builds more easily
You can mix the old material and the new material together without any issues; drying times are unaffected – remember to always open the bag from the handle end.
*This will increase in colder temperatures and more moist conditions. Added heat, not direct heat, and ventilation will assist during these times.
smooth concrete and previously decorated surfaces.
*Smaller tip sizes are recommended for the improved formula and newer Graco machines (Vortex Pump). Bigger tips can be used with existing product and older machines. For more information, please contact Knauf Technical Services. ** The Airless material arrives in fully enclosed cardboard containers, which are not stackable.
Website www.knauf.co.uk
Training is available; if you are interested just contact our Technical Service. For further information please view our new improved Airless Finishes page
www.knauf.ie
Website www.knauf.co.uk www.knauf.ie
Technical Service
LiveWebchat 09:00 –17:00
Email:technical@knauf.co.uk
Knauf Kemsley Fields Business Park
Sittingbourne Kent ME9 8SR
Customer Service
Technical Service
UKTel: 0800 521 050
Live Webchat 09:00 –17:00
Knauf Kemsley Fields Business Park
Eire Tel: 01 4620739
Email: technical@knauf.co.uk
Email: cser vice@knauf.co.uk
Customer Service
UK Tel: 0800 521 050
Eire Tel: 01 4620739
Email: cservice@knauf.co.uk
Sittingbourne Kent ME9 8SR
Knauf 87 BroomhillRoad Tallaght Dublin 24
Knauf 87 Broomhill Road Tallaght Dublin 24
The information given in this publication is believed to becurrent andaccurate as atthe date ofpublication, but nowarranty, express or implied is given. Updates will not be automatically issued. © Copyright
Knauf2020 Knauf Airless Backing Knauf Airless Finish Knauf Airless Finish Light Knauf Airless Impact Finish Su b str a te / p ur po se Blockwork, concrete, PWR and undulating surfaces. Wallboard,
Dr ywall or plasterboard systems concrete
and
Thickn es s (o ne laye r) 3mm The process can be repeated is achieved. 1– 2mm Prior to decoration. 1– 1.5mm Prior to decoration. 1– 1.2mm Prior to decoration. Drying Time 12 – 36 h 12 – 24 h 12 – 24 h 12 – 24 h Tip Size* 537 − 541 531 − 535 527 − 531 531 − 535 Sizes available 21kg 25kg** 16.5kg** 25kg** Coverage (1mm thickness) Approx 15m2 Approx 15m2 Approx 14m2 Approx 15m2 Finish Ivory/off-white Shelf Life 12 months 12 months 12 months 12 months
where durability
robustness required.
**
KML100332
of
issued. © Copyright Knauf 2021
The information given in this publication is believed to be current and accurate as at the date
publication, but no warranty, express or implied is given. Updates will not be automatically
Ivory/off-white
Ivory/off-white
Ivory/off-white
