SCHÖNOX AST is a superfine, sturdy, all-purpose repairing mortar which is quick drying, extendable to feather finish and very easy to handle. Filled in handy 4.5kg bags.

Bulk Buy

£81.85 tax excl.

£98.22   tax incl.

Product Description

SCHÖNOX AST is a superfine, sturdy, all-purpose repairing mortar which is quick drying, extendable to feather finish and very easy to handle. Filled in handy 4.5kg bags.

Product Characteristics

  • EMICODE EC 1PLUS R: very low emission, regulated
  • easy to mix, no direct thickening after mixing
  • no bonding to the trowel
  • for interior use
  • very sturdy
  • superfine
  • able to shape
  • fast drying
  • easy to grind
  • high level of hardness and strength
  • very smooth application
  • suitable for application on subfloor heating systems
  • synthetic resin-modified
  • low consumption / high coverage
  • layer-thickness 0 to 6mm without aggregates
  • low tension/stress
  • suitable for castor wheels loading with layer-thickness more than 1,0mm according to EN 12 529
  • very smooth, low-pore surface


SCHÖNOX AST is suitable for patching, filling, repairing and levelling:

  • of staircase steps and platforms
  • as a levelling compound to level out differences in height to neighboring areas
  • as a repairing mortar for filling holes and deepenings


SCHÖNOX AST is suitable to be used on interior substrates like e.g.:

  • calcium sulphate based screeds
  • old substrates such as ceramic tiles, natural stones and terrazzo
  • concrete
  • cement and rapid cement screeds
  • mastic asphalt screeds (sanded) IC 10 and IC 15 according to EN 13 813, layerthickness 1,0 to 5,0 mm
  • old substrates with old water-resistant adhesive residues
  • magnesia screeds
  • wooden substrates

It is your responsibility to read the Product Data Sheets (available below) before you place an order and prior to application of the product. The content of this website is our best recommendation and is not advice. Coverage rates quoted are approximate, you agree that coverage depends on the condition of the substrate, surface absorption, texture and application method. We ALWAYS recommend a trial area is coated to ensure the product meets your requirements before use.

Technical Data

Typical Coverage (per coat)1.3kg/m²/mm
Touch Dry1 Hour
The figures stated above are approximate. Please ensure you refer to all datasheets for full application information.


Product Data Sheet


Safety Data Sheet

Customer agrees that before placing an Order, Customer has read and understood the most up to date Product Data Sheet for the Product. Where we have access to the Product Data Sheet from the manufacturer, we will either provide a copy on request, or include a link to the Product Data Sheet available on the manufacturer’s website. Customer further agrees that we have no liability for any errors or omissions contained within the Product Data Sheets. For more information, please see our Terms & Conditions of Sale.


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