Product Codes

  • Grey 30620339


Approx. 4m2 per bag at 3mm depth (depending on the smoothness of the floor surface & application technique)
Blend of cements and fibres
+5°C to +25°C
3mm to 30mm
Up to 20 minutes after mixing (depending on ambient temperatures)
Foot traffic: approx. 4 hours. Loose lay floor coverings: approx. 8 hours. Bond floor coverings: approx. 12 hours (<3mm depth at +18°C, depending on ambient conditions)
Store and transport securely. Store for up to 6 months from date of manufacture in original, unopened packaging, clear of the ground, in cool, dry conditions within the temperature range +5°C to +25°C and out of direct sunlight. Protect from excessive drafts, frost, damp, condensation and dew.
Dry, free flowing powder
Typically 30N/mm² after 28 days
Typically 7N/mm² after 28 days
Clean tools and equipment with warm soapy water immediately after use

Key Features

Fibre-reinforced for flexibility
Rapid setting
Can be used over sound, firmly bonded timber flooring


Bostik SL C530 FLEX is a flexible smoothing compound reinforced with fibres. It has excellent workability and flow characteristics, is self-smoothing and can be trowelled to depths between 3mm and 30mm in a single application. It is suitable for smoothing and levelling sound, strong substrates where minimal vibration or lateral movement occurs. It can be laid over most common substrates, including concrete, sand/cement screeds, stone, anhydrite screeds, rigid metal, terrazzo & quarry tiles, asphalt and other solid and rigid subfloors. It may also be used over sound, firmly bonded timber flooring such as 12mm flooring grade SP101 plywood and P5 chipboard, provided the timber is mechanically fixed. Bostik SL C530 FLEX should not be used over adhesive residues. Bostik SL C530 FLEX is protein-free, making it suitable for use in biologically sensitive areas. The low odour formulation makes Bostik SL C530 FLEX ideal for occupied buildings. It is suitable for use with warm water underfloor heating systems and for encapsulating electrical radiant mat & cable heating systems provided a surface temperature of +27°C is not exceeded. It is suitable for normal wear in commercial locations. It is not to be used as a wearing surface and should always be covered with a floor covering. For interior use only.

Case Study
Bostik – Flooring in Healthcare
Bostik – Flooring in Healthcare
Technical advice and quality subfloor preparation products and flooring adhesives from Bostik are said to have enabled the progress of the new hospital building.
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