Salt-resistant, breathable, scratch-coat mortar, based on hydraulic pozzolanic reaction binder, to be used as first layer to improve the bond of the render and even out the absorption of the substrate. TECHNICAL DATA: Maximum size of aggregate: 2.5 mm. Mixing ratio: 100 parts of POROMAP RINZAFFO PLUS with 19- 21 parts of water (4.75-5.25 l of water for each 25 kg bag). Coefficient of permeability to water vapour: < 20 µ. Workability time of wet mortar: approx. 60 minutes. Thickness to be applied: 5 mm. Classification: EN 998-1 - GP type mortar CS IV class. EMICODE: EC1 Plus - very low emission. Storage: 12 months. Application: trowel or continuous feed rendering machine. Consumption: 7.5-8 kg/m²(per 5 mm of thickness). Packaging: 25 kg bag.