Pre-blended, polymer-modified mortar with a low modulus of elasticity, high compressive strength and good resistance to de-icing salts and freeze-thaw cycles, exposure class XF4, for grouting architectonic stone floors. TECHNICAL DATA: Pot life of mix: 20 minutes. Set to foot traffic: 6 hours. Waiting time before putting into service: 7 days. Colour: grey. Application: rubber MAPEI trowel or rake. Cleaning: MAPEI sponge or Scotch-Brite® pad (or single-head rotary polisher with Scotch Brite® type abrasive felt disk). As an alternative, hydro-cleaner once it has started to harden. Storage: 12 months. Consumption: according to the size of the joints and slabs. Packaging: 25 kg.