KNAUF Base LUP Base Light Plaster 15mm 30kg

KNAUF Base Coat LUP Base Coat Light Plaster 15mm 30kg

Fast-setting lime-cement lightweight base coat with lightweight aggregates suitable for all porous masonry substrates as a basement wall and base coat in exterior areas, as well as a base coat in damp rooms. Also suitable as a substrate for ceramic tile coverings.

• Properties:
  • Compressive strength category CS III according to DIN EN 998-1
  • Suitable for interior and exterior use
  • Water-resistant
  • Fast-setting
  • Contains lightweight aggregate
  • Can be applied with machine or manually
  • Fine grain structure

Application Area

Knauf Base Coat LUP is a lightweight base coat for mineral and pasty surface plasters in interior and exterior areas.

• As basement wall exterior plaster
• As a base coat on masonry of compressive strength classes 8
• As a base coat on concrete
• As a base coat for tiles in damp rooms, residential buildings, and kitchens

Execution

Single-layer 15–20 mm with plaster thicknesses of 20–30 mm; for two or more layers, roughen the lower layer with a broom. After complete drying of the first layer (1 day per mm of plaster thickness), apply the second layer and make it flush. Embed a surface plaster mesh close to the surface or, alternatively, after complete drying of the second layer, perform a full-surface reinforcement with SM700Pro, SM300, or Base Coat SM.

Preparation

Normal absorbent substrates can be plastered without pre-treatment. For highly absorbent substrates, perform the application wet-in-wet, applying a 5–10 mm layer first, then applying the second layer wet-in-wet to the required plaster thickness. For non-absorbent substrates, apply a mineral adhesion bridge with SM700 Pro, SM300, Base Coat SM, or Lustro.

Application

For pre-treated substrates, allow the primer applied to the substrate to dry completely. Base coats are usually processed with a mixing pump, e.g., PFT G4/G5, which is particularly efficient and time-saving. They can also be applied manually. Afterwards, distribute the plaster surface evenly with a trowel or straightedge and smooth after initial setting.

Drying

The finished base plaster surface must be completely dry before further coating. The drying time depends on the plaster thickness and external conditions such as weather, temperature, etc. To prevent too rapid drying, exterior plasters should be protected from direct sunlight. Generally, a minimum drying time of 1 day per mm of plaster thickness applies.

Work Safety and Storage