Sopro SLC 578 – Self Levelling Compound 3-40 mm

Sopro SLC 578 is a pumpable, self-levelling, rapid-set, cementitious surface filler, for use in conjunction with floor heating internally. Used for the production of smooth, unbroken surfaces prior to installation of floor coverings, e.g.ceramic tiles, natural stone finishes, textile, elastic and parquet flooring. For coat thicknesses between min. 3 mm and max. 40 mm. (Sopro FS 5 549 floor-levelling compound is recommended for thin-coat (≤ 3 mm) applications; Sopro FE 678 Rapidur® self-levelling screed is recommended for coat thicknesses > 40 mm.) Low-chromate to Regulation (EC) No 1907/2006, Annex XVII.


Suitable Substrates include; cement screeds, concrete and untreated concrete surfaces (min. 3 months old), heated floor constructions (cement and calcium sulphate screeds), magnesium oxychloride (magnesite) screeds.

Related Downloads

icon-pdf TDS Sopro SLC 578 – Self Levelling Compound 3-40 mm

icon-pdf SMET Professional Tiling Systems Brochure

icon-pdf SMET Floor Screeds and Compounds Product Selector

NBSplus NBS Specification Clause

Benefits of Sopro SLC 578 – Self Levelling Compound 3-40 mm

• For 3–40 mm coat thicknesses
• Pumpable
• Suitable for floor heating systems
• For indoor use only
• ral stone, glass mosaic and agglomerate tile coverings
• Approx. 1.6 kg/m² per mm coat thickness

Technical Details for Sopro SLC 578 – Self Levelling Compound 3-40 mm

Coat Thickness 3–40 mm
Mixing Ratio (water only) 5.25–5.75 ltr water : 25 kg Sopro SLC 578; take care to ensure exact propor­tioning of water
Flow Table Value 26.5–27.5 cm (Vicat ring to DIN 1164; size: internal diameter 65 mm at top and 75 mm at bottom, height 40 mm; on suitable, dry, clean glass plate)
Pot Life 30 – 40 minutes
Walkable After 2–3 hours
Coverage Approx. 1.6 kg/m² per mm coat thickness
Ready to Recieve Floor Covering After approx. 24 hours for 3–15 mm coat thickness where tiles are to be installed; after approx. 24 hours per cm for greater coat thickness or where carpeting, parquet etc. is to be installed
Application Temperature From +5°C to +25°C (substrate, air, material)
Specified Times Apply for normal temperature range of +23°C and 50% relative humidity; higher temperatures shorten and lower temperatures lengthen these times.
Packaging 25 kg Bag
Tools and Cleaning Mixing attachment, squeegee, finishing trowel, mixing pump (e.g. Putzknecht S 48 or Putzmeister G 78), spiked roller; wash tools with water immediately after use.

Available in 25 kg bags, 42 per pallet.

SMET is renowned for its comprehensive range of professional CE marked, EPD certified products.  The SMET flooring range includes; calcium sulphate-based screed binders, self-smoothing calcium sulphate-based screeds & compounds, cement-based screed binders, self-smoothing cement-based screeds, lightweight flowing screedsprofessional tiling materials & tools, tanking and wet-room solutions, barrier coats, primers & bonding agents; for any domestic, commercial, industrial or design-flooring use.

Suffice to say, the SMET product portfolio includes a German-made floor solution for any flooring requirement. Get in touch for your upcoming floor screed or tiling project