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General Purpose Smoothing Compound

SX200 is a fast drying, self levelling, pump applied underlayment, for levelling of concrete floors before the installation of floor coverings.

Provides good resistance to impact, point loading and abrasion. Ideally suited to floors in office buildings, shops, public buildings, schools, hospitals, airports  and prisons.

  • Fast setting and drying - walk on after 2 - 4 hours under suitable conditions
  • Rapid installation – 2,000 m² per day for 7 mm thickness, under suitable conditions
  • Protein free - will not harbour bacteria

Moisture Testing

(in accordance with British Standards 8203)

  • Suitable for application on substrates with <75 % RH.
  • It is recommended that a moisture test is conducted prior to the application of SX200. For further details or to arrange for a moisture test please contact tremco illbruck Technical Services.
  • All surfaces must be primed with CS150 Acrylic Primer (porous substrates) or CS100 Epoxy Primer (non-porous substrates).

Protective Equipment 

  • Use in well ventilated conditions and ensure all recommended protective equipment is worn during handling & use of this product. For full recommendation, refer to safety data sheet.


  • Ensure all surfaces to be coated are clean, dry, frost free and free from grease, oil, dirt, dust, loose friable material and any other contaminants (coating, laitance, etc.).
  • Any surface hardener or curing compounds should be thoroughly removed prior to the application of SX200.
  • Mechanical preparation, using an enclosed shot blasting machine may be recommended and should be followed by thorough vacuuming to remove all surface dust.
  • Concrete and sand/cement screeds must be fully cured and incorporate an effective damp proof membrane. For full details of surface preparation contact tremco illbruck Technical Services.


  • All surfaces must be primed with CS150 Acrylic Primer (porous substrates) or CS100 Epoxy Primer (non-porous substrates).


  • Mix at slow speed using an electric drill and paddle. Add approximately 4.5 to 4.8 litres of water to the mixing vessel and add the 25 kg of SX200 while mixing to ensure a smooth final mix, free from lumps. Do not add additional water as this will reduce the performance of the final screed.
  • A 65 mm by 40 mm flow ring should be filled with pre-mixed SX200. Using a flow chart, a spread ratio of between 220 mm and 240 mm should be obtained to ensure that a correct mix is passing through the pump.


  • SX200 should be applied directly after mixing either by pouring a ribbon of material along the wet edge and then trowelled to form a smooth, even finish or by pumping directly onto the subfloor.
  • Whilst still wet a spiked roller should be used to blend the flow lines together, working in a direction perpendicular to the pouring.
  • Minimum thickness of SX200 should be 4 mm.
  • For application over 8 mm, a 3 mm clean aggregate can be added to the mix at a ratio of 1:1.
  • For thicknesses over 6 mm up to 40 mm prepare the surface with ES300 or ES400 Surface DPM blinded with a 1 - 2 mm sized dry silica sand/quartz at 2 kg/m².

For full application information, refer to product data sheet or contact tremco illbruck customer services on 01942 251400


Technical data




A combination of natural sands, fillers and Portland cement 
Pot Life
(at 20°C)
Typically 20-30 minutes
Fire ResistanceEN13501-1 E
Impact ResistanceBS8204 Part 1 Cat: A
Temperature Resistance+50°C max
Ultimate Compressive StrengthEN13892-2: 33 N/mm²
Flexural StrengthEN13892-2: 8 N/mm²
Shore D Hardness88
Adhesion to C30 Concrete28 Days: > 1 N/mm²
Shrinkage< 0.06%
Maximum Particle Size1 mm
Protein ContentNil
Thickness4 – 40 mm
Laying Temperature5 – 25°C
Flow Ring65 mm diameter x 40 mm high: 220 – 240 mm
Mix Ratio per 25 kg4.5 – 4.8 litres water
CoverageAn average thickness of 4 mm will provide a typical coverage rate of 3.75 m² per mix
The coverage rate is based on a flat level surface, additional material should be allowed for where the surface is rough, uneven or where a specific SR level is to be achieved.
Cure Time
(at 20°C)
10 mm thickness:
at 10°C: Walk On 4 - 8 hours, Full traffic 2 days
at 20°C: Walk On 2 - 4 hours, Full traffic 2 days
Drying TimeMoisture sensitive floor finishes can be installed when the screed is dry to 75% RH as per BS8203, typically after 24 hours, dependent on thickness and ambient conditions (20°C, 50% RH)
After 6 hours curing without draughts ensure the area has sufficient ventilation to allow the screed to dry
StorageStore indoors in dry conditions at 25°C, stacked not more than 2 pallets high
Shelf Life12 months when stored as recommended in original unopened packaging
High temperatures and humidity will lead to a reduced shelf life

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