AkkordLeichtspachtel

Suitable Substrates

Substrate Preparation

Renders according to DIN EN 998-1 class CS II - CS IV / compressive strength min. 2 N/mm²: Solid, normally absorbent and even renders can be coated without primer coat. Prime slightly sanding, absorbent renders with OptiSilan TiefGrund, CapaSol RapidGrund or Sylitol RapidGrund 111. Prime more sanding renders with OptiSilan TiefGrund. 

Gypsum plasters according to DIN EN 13279-1 / compressive strength min. 2 N/mm²: Sand and remove dust from gypsum plasters with sintered skin, prime with OptiSilan TiefGrund, CapaSol RapidGrund or Sylitol RapidGrund 111. 

Gypsum boards/gypsum planks: Priming coat with OptiSilan TiefGrund. 

Gypsum boards (plasterboard): Sand off filler burrs. Prime sanded gypsum filler areas and the gypsum boards with OptiSilan TiefGrund, CapaSol RapidGrund or Sylitol RapidGrund 111. In case of stronger absorption, prime with OptiSilan TiefGrund. For boards with water-soluble, discolouring ingredients, prime with Caparol AquaSperrgrund. Observe BFS Data Sheet No. 12, Part 2. 

Concrete: Remove any release agent residues and chalking, sanding substances. Prime with OptiSilan TiefGrund, CapaSol RapidGrund or Sylitol RapidGrund 111. 

Sand-lime masonry: Dry brush off existing salt efflorescence. Prime with CapaSol RapidGrund or Sylitol® Rapidgrund 111. In case of stronger absorption, prime with OptiSilan TiefGrund. 

Load-bearing coatings: Recoat matt, slightly absorbent coatings directly. Roughen glossy surfaces and paint coatings. 

Non-bearing coatings: Remove non-stable varnish and dispersion paints or synthetic resin plaster coatings. Prime coarsely porous, sanding or absorbent surfaces with OptiSilan TiefGrund. Remove non-bearing mineral paint coatings mechanically and remove dust from the surfaces. Apply one priming coat of OptiSilan TiefGrund. 

Glue-Bound Distemper (Limewater Colour/Paint): Wash off the existing distemper very thoroughly, allow to dry and prime with Dupa-Putzfestiger. Alternatively, remove mechanically, rinse and prime with OptiSilan TiefGrund. 

Woodchip, relief or embossed wallpapers made of paper and sample wallpapers: Coat without pre-treatment. For relief and embossed wallpapers made of paper as well as sample wallpapers, apply a trial coat. Foamed wallpapers may cause intermediate reactions (stickiness, odour) when coated. 

Removed wallpaper: Wash off paste and waste paper residues. Apply one priming coat of OptiSilan TiefGrund. 

Mould-infested surfaces: Remove mould by wet cleaning. Wash surfaces with Capatox and allow to dry thoroughly. Observe the legal and official regulations (e.g. the Biological Substances Ordinance and the Ordinance on Hazardous Substances). Increased protection against renewed infestation can be achieved with the products Malerit-W, Indeko-W and Fungitex-W. 

Surfaces with nicotine, water, soot or grease stains: Wash off nicotine stains as well as soot or grease stains with water, adding a grease-dissolving cleaning agent, and allow to dry thoroughly. Clean dried water stains by brushing dry. Apply a barrier priming coat of Caparol AquaSperrgrund fein (see Technical Information No. 384) orCaparol-Filtergrund grob (see Technical Information No. 845). 

Wood and wood-based materials: Apply one priming coat of Capacryl Holz-Isogrund. On boards factory-coated with melamine resin, apply one priming coat of Capacryl-Haftprimer. The joint areas/panel joints are not to be finished crack-free. Here, for higher visual requirements, a decoupling layer with thin gypsum boards with appropriate filling is recommended. 

Old lime filler techniques: Remove sintered layer on the surface by sanding. In case of negative wetting test with water on sanded surface, the entire lime filler layer must be removed and the substrate must be rebuilt accordingly. In case of positive wetting test with water on sanded surface, prime with OptiSilan TiefGrund. 

Chips, joints and defects: Fill the recess with Füllspachtel P. 

Note Q2/Q3 Filling / thin gypsum layers < 0.5 mm: When using gypsum-containing, hydraulically setting levelling compounds in quality level Q2/Q3, a transparent, water-based primer is recommended. For this, we refer to the Maler&Lackierer leaflet No. 2 -9/2020 "Adhesion problems of coatings on filled gypsum (cardboard) boards" of the Bundesverband Farbe, Gestaltung, Bautenschutz and the Bundesausschuss Farbe und Sachwertschutz. As an alternative to gypsum-based Q3 filling, filling with pasty filling compounds has proven successful. 

Method of Application

Levelling filler applied by hand:

Stir well before application and apply with a stainless steel smoothing trowel. After drying, wet and felt or sand dry.

AkkordLeichtspachtel is particularly suitable for flat levelling on plasterboard, as this material can be drawn out to "zero". AkkordLeichtspachtel can be used in conjunction with a paper or glass fibre reinforcement strip for the reinforcement of chamfered/bevelled board joints of gypsum boards and gypsum building boards (GKB according to DIN 18180). Please note that the board joints may only be filled when there are no more changes in length due to temperature or moisture stress. The room temperature must not fall below +10 °C (see DIN 18181 Section 5). Fill the joint cavity with Akkord lightweight filler, insert the reinforcement strips, press on and smooth. After drying, coat again with AkkordLeichtspachtel. Joints wider than 3 mm should be filled beforehand.

Suitable spraying equipment:
The filler can be applied with plaster delivery devices and powerful airless devices. The delivery distance of the product depends on the performance of the airless device and can be obtained from the device manufacturer.
Remove all filters from airless guns.
Airless spray guns with a higher flow rate recommended by the manufacturer should be used for levelling compounds. Depending on the performance capacity of the airless device, temperatures below +10 °C may restrict delivery due to slight changes in the viscosity of the filler. A material temperature of +10 °C must be ensured for these devices.

Spray application:
The coating is particularly efficient and economical when used in conjunction with powerful spraying equipment for wall and ceiling surfaces.

Work sequence:
Supply the appliance with levelling compound. We recommend using a material hopper. Full-surface, saturated spray application with filler, undiluted, and immediate levelling with a suitable steel trowel. The filler can be sanded after drying. Sanding meshes such as Abranet from Mirka or GranatNet from Festool with a grit size of 320 enable more effective work performance.

Suitable spraying equipment:
The filler can be applied with plaster delivery devices and with powerful airless devices. Airless spray guns recommended by the respective manufacturer should be used for levelling compounds. These guns have a higher flow rate and make it much easier to apply the levelling compound, and stirring with an agitator is recommended for buckets.

^✱ Device-dependent spraying head required

Work team and performance:
A spraying column consists of a team of 2-3 workers. One member of the team applies the material in a uniform layer thickness with the spraying device, 2 employees pull off the applied material evenly and then smooth the surface.

Special processing instructions for levelling and sprinkling:
In larger rooms, the ceiling must be levelled first before the wall surfaces can be sprayed. In this case, however, the upper part of the wall surfaces (the so-called head) should also be sprayed and levelled up to a height that can be reached from the floor. The lower part of the wall surfaces is then sprayed and also smoothed.

If only the ceiling surface is to be treated, it is advisable to spray a border away from the wall surfaces first and then spray the surface. After smoothing and slight drying, smooth all corners with a wet radiator brush. Remove bubbles after slight drying by smoothing again, repeat if necessary. Fill existing nests by hand.

After the levelling compound has dried thoroughly, block rust penetrations with a suitable anti-corrosion primer, e.g. Capalac AquaMulti Pimer, by stippling. Then apply a coat of paint.

Insert reinforcing fleece:
When using a suitable glass fibre-based painter's fleece (approx. 40 g/m² weight), apply AkkordLeichtspachtel generously and in sufficient quantity for 2 to 3 strips, comb through with a stainless steel notched trowel (4 x 6 x 4 mm or 6 x 6 x 6 mm), lay in the fleece and press down evenly and smoothly with a stainless steel smoothing trowel, leaving approx. 5 cm unpressed in the edge area towards the next strip. Lay the next sheet with an overlap of approx. 5 cm and press down to the seam area. Make a double seam cut in the seam area with a cutter knife (or sliding foot knife if necessary) and then press down. Wipe off any leaking filler material with a damp cloth. Lightly sand any slightly raised seam areas before further treatment. Please also observe the information in the Technical Information for Capaver AkkordVlies G45 SP.

Surface Coating System

Recoat the levelled surface with:

Caparol dispersion paints, Caparol latex paints, Caparol renders:
After drying, apply a priming coat of OptiSilan TiefGrund, CapaSol RapidGrund or Sylitol RapidGrund 111 and, if plaster is subsequently applied, an intermediate coat of Putzgrund 610.

Caparol glass/cellulose wall coverings:
After drying, apply a primer coat with OptiSilan TiefGrund or CapaSol RapidGrund.

Surface-finished, highly diffusion-blocking or diffusion-tight wall coverings:
Akkordspachtel KF must be used for levelling. The technical specifications of the wall covering manufacturer must also be observed.

Consumption

Application Conditions

Drying/Drying Time

Note

An evenly absorbent and non-slip substrate is required to apply the maximum specified layer thickness. Under these conditions, the material can be applied in one coat without starting to run, sag or crack. After application, the filler must be expected to shrink in volume over the entire surface as it dries. Particularly for thick layers of material to be applied over large areas and for coarse substrates, a double application is usual and recommended in view of the site conditions and in order to maintain the necessary drying times.

AkkordLeichtspachtel is not suitable for damp rooms. Due to the use of natural fillers, slight differences in colour shade are possible. If a speckle application is carried out that is to remain uncoated, we recommend that the same production numbers are used for the filler and the speckle application.

When used as a sprinkling on wall surfaces, the coating should be reworked with Caparol dispersion paints. This allows a higher resistance to be achieved, which is often necessary for wall surfaces.

When using plaster conveyor equipment, abrasion may occur, especially with new screw conveyors and hoses. Please observe the manufacturer's instructions for the plaster conveyor equipment.

Fine air bubbles may form on dense, less absorbent substrates. These can be removed after a short flash-off time by smoothing again. The time for re-smoothing depends on the temperature and humidity of the object. If bubbles appear again after re-smoothing, smoothing was carried out a little too early. Then repeat the smoothing process. To minimise this effect, a pigmented primer coat with Caparol Haftgrund is required.

In the case of rough, textured substrates, subsequent levelling may be necessary to achieve a smooth, even surface.

When reworking gypsum-based levelling compounds, swelling, blistering and flaking may occur due to prolonged exposure to moisture. It is therefore necessary to ensure rapid drying through adequate ventilation and temperature. Observe information sheet no. 2 "Filling of gypsum boards" of the German Gypsum and Gypsum Board Industry Association. Apply a primer coat of OptiSilan TiefGrund, CapaSol RapidGrund or Sylitol RapidGrund 111

German Certificates

• Report of reaction to fire classification.
• Emission chamber measurements in line with DIN ISO 16000-9.

Please Note (Status as at Date of Publication)

Disposal

EU limit value for the VOC content

Product Code Paints and Enamels

Substances of Content - Declaration

Customer Service Centre

Technical information

• Technical Information No. 717

Sustainability data sheet

• Sustainability Fact Sheet AkkordLeichtspachtel

Material safety data sheet

• System instructions AkkordLeichtspachtel

Technical information

• Technical Information No. 717

Sustainability data sheet

• Sustainability Fact Sheet AkkordLeichtspachtel

Material safety data sheet

• System instructions AkkordLeichtspachtel