Sandplast LW

Sandplast LW

Flügger Sandplast is a ready-mixed, ready-to-use filler. Used for smoothing out of ceilings and walls. The products have optimised working properties and filling capacity, good sanding characteristics and produce minimum shrinkage.

Product Description

Filler for rooms exposed to varying moisture conditions. Contains light, fine-grained filler paste with good filling capacity. Finish by treating with a wall covering and/or suitable ceiling or wall paint in the desired colour and gloss.
  • Moisture-stable filler
  • High tensile strength
  • Blue-toned


Filling and reinforcing of joints with Marco Spark-Perf or Sheetrock plaster tape and filling screw holes on gypsum plasterboard.
Patching and filling when smoothing out plaster, concrete, lightweight concrete, gypsum plasterboard and previously painted surfaces.


Must be clean, dry, firm and suitable for surface treatment.


Remove loose material and paint by cleaning, sanding and dusting.
Remove dirt, grime, grease and chalking materials by cleaning with Fluren 37.
Water-soluble discolouration, nicotine and soot can be cleaned with Fluren 49.
Sand flat hard, slippery surfaces.
Apply the filler paste and smooth out.
Dust off and fill the gypsum board joints and place the plaster tape with the prefabricated fold against the joint, pressing firmly with the knife and pressing down into the wet filler paste.
Press the tape in so far that a thin layer of filler paste is deposited on the outside of the tape.
At the same time, scrape the filler over the tape.
Once it has dried, fill the joints and screw holes twice.
Sand the surface and prime it before any additional treatment.


Apply and smooth out using a filler knife.
Decide your choice of tools based on the size of the surface.
Apply a sufficient amount and then work and smooth out the filler paste.
Cold/ heat can affect the viscosity of the material.
Condensation during drying/curing must not form.
Cold and increased humidity extends drying time, full curing and recoating interval.
Increased temperature and low atmospheric humidity reduce drying time and full curing.
Risk of shrinkage where the filler paste is not completely cured before additional treatment.
Always perform a test treatment for a check and acceptance of adhesion and result.


Even surface for additional treatment.

Be Aware

Install the gypsum board according to the manufacturer’s instructions and standards.
See the Flügger user directions for gypsum board, filling of joints.

Environmental information

Clean off the paint from tools and wash them with water. Bring remains of fluent paint to the local recycling centre. Minimize your paint waste by pre-estimating how much paint you need. Keep the leftover paint for future use so you can effectively reduce the environmental impact.

Storage: Cool, frost-free, and tightly closed

Protection equipment: Spray painting: painting suit, full face mask with combined filter. Painting: eye protection, gloves. Sanding: respiratory protection.

Technical Data

Plaster & Sealant
Density (kg/liter)
Weight %
Volume %
Nominal spreading rate (m2/l)
Workable temperature
Min. +10°C
Max. humidity 80 % RH.
Dry to touch at 20°C, 60% RF (Hours)
Fully cured at 20c, 60% RF (Days)
Cleaning of Tools etc.
Supplementary Info
The product meets the requirements of M1: Emission Classification of Building Materials: Protocol for Chemical and Sensory Testing of Building Materials.

Current TDS Version

październik 2021

Replaces TDS Version

wrzesień 2021