One-component, fine-grained, white cementitious mortar for laying cellular-concrete blocks and for smoothing over the surface in layers of up to 10 mm thick. Fire resistance class according to EN 1364-1 EI 240 - E 120. TECHNICAL DATA: Maximum diameter of aggregate: 1 mm. Mixing ratio: 100 parts of POROCOL FF with 27-29 parts of water. Pot life of mix: approximately 2-3 hours. Minimum applicable thickness: 1 mm. Maximum applicable thickness: 1 cm per layer. Classification: – EN 998-1 - type GP mortar, category CS III; – EN 998-2 - type T mortar, class M5. Storage: 12 months. Application: notched or smooth trowel. Consumption: – as adhesive for flat block walls: 2-4 kg/m²; – as skimming layer for flat block walls: 1.2 kg/m² per mm of thickness. Packaging: 25 kg bags.