Sprayed polymer plaster (MP Base)

Clean the substrate of dust and loose parts and remove, ensure that the surface is smooth. All substrates must be stable, dry, even and free of grease and dust as well as free of any residual substances that may reduce the adhesion.

Cover easily-soiled building components before commencement in accordance. Preparation of the substrate in accordance with the table «Substrate and pretreatment». Ensure that the drying time for the preliminary / primer coats is observed before continuing work. 

Using the plaster base, correctly applied and/or pretreated concrete substrates with a residual moisture of up to 6 % by weight and a substrate temperature ≥ 2+ °C can be plastered. Plaster base is used with ceiling temperature control systems with plaster thickness›s from 20 to 25 mm.

Mixing pump G4 / G5
■ Stator D3-6
■ Rotor D3-6
■ Mortar hoses Ø 25 mm
■ Wet mortar pumping distance up to 30 m

Mix the contents of one bag with approx. 19 litres of clean water without further additions using an agitator until an application-ready consistence is achieved.
Machine application
Adjust the water feed to achieve a lean mortar consistence (approx.1 bar /metre mortar hose). Depending on the temperature, breaks in spraying not exceeding 10 to 15 minutes are possible. Clean the machine and hoses with longer breaks / interruptions in application.
Application

In order to create a level surface, spread the thrown-on / applied or machineapplied material flush and perpendicular with a H-straight edge. After initial setting has commenced, level with a feather edge and align the corners. If required, the surface can be re-worked with a wide spatula. After wetting the plaster surface with a sponge float, create enough plaster sludge and smoothen and sponge minor unevenness. After the plaster surface has set lightly, smoothen it with a wide spatula or finishing trowel. On non-frictionally bonded components between the wall and ceiling, reveal connections, etc. the separation must be continued with a separation (trowel) cut in the plaster layer. Separating strip is recommended instead of a separation cut.

Provide good ventilation to ensure quick drying of the plaster. The drying time at 10 mm plaster thickness is an average of 14 days depending on the humidity, temperature and ventilation of the room. The drying time will be extended with unsuitable temperatures / air humidity. If mastic asphalt screed is applied after plastering, sufficient transverse ventilation is required to avoid thermal stresses.

Single- or double-layer: 8 to 50 mm

Single-layer 8 to 50 mm

Average plaster thickness 10 mm, minimum plaster thickness 8 mm.

Cover tape conduits by min. 5 mm.

In special cases, a plaster thickness of up to 50 mm can be applied in a single-layer to a wall, however, application of 2 layers should be considered when the plaster thickness exceeds 35 mm, as there is an increased drying time before further coatings can be applied with a single-layer. The overall drying time is reduced when the first plaster layer dries more quickly.

Double-layer ≥ 35 to 50 mm

Roughen the first layer with a trapezoid metal sheet or similar and apply suitable primer (diluted 1:3 with water) when fully dry. The next layer can be applied after the first layer is fully dry.

(Concrete) Ceilings

may only be plastered as a single-layer and a maximum plaster layer of 15 mm.

EPS boards and sheathing blocks as well as wood wool lightweight boards should have a single-layer applied and the entire surface must be reinforced (see reinforcement).

Minimum plaster thickness 15 mm.

Application as a single-layer in a minimum plaster thickness of 10 mm. Level and roughen wall surfaces after application. Do not smoothen or sponge the surface. Allow to dry and set fully before priming and applying a tile covering.

In non-commercial bathrooms and kitchens (e.g. WCs in schools, bathrooms in hotels, hospitals, residential-care and nursing homes) as substrates for tiles and floor slabs, if the weight of the tiles and floor slabs including the thin-bed mortar does not exceed 25 kg/m².

With a material change in the plaster substrate, with insulation boards, etc., bed reinforcement mesh in the upper third of the plaster layer with at least 100 mm joint overlap and 200 mm overlap on all sides to the flanking component.

The plaster is applied wet-in-wet in two layers, whereby the first layer has not yet started to set on the surface when the 2nd layer is applied.

Up to about 180 minutes depending on the plaster substrate.

Do not apply material at air and/or substrate temperatures below +5 °C and above +30 °C.

Clean the machines and tools with water immediately after use.