Salt-resistant, hydraulic pozzolanic-reaction binder-based transpirant keying mortar used as the first layer in de-humidifying render systems. TECHNICAL DATA: Maximum size of aggregate: 2.5 mm. Mixing ratio: 100 parts of POROMAP RINZAFFO with 15.5-17 parts of water (4-4.5 litres of water per 25 kg bag of product). Porosity of wet mortar: 6%. Water vapour permeability coefficient: < 20 µ. Workability time of fresh mortar: approx. 60 mins. Maximum applicable thickness: 5 mm. Classification: EN 998-1 - GP type mortar, category CS IV. EMICODE: EC1 R Plus - very low emission. Storage: 12 months. Application: trowel. Consumption: 7.5-8 kg/m² (for a 5 mm thick layer). Packaging: 25 kg bags.