Sikafloor-440 Level Fibre Reinforced is a high-strength, flexible cement-based levelling compound, reinforced with fibres and polymers, specifically designed for use with underfloor heating systems and applications over wooden floors. When mixed with water, it forms a smooth, self-levelling compound that dries to a tough, flexible finish. This versatile compound can be overlaid with most common floor coverings or left as a final wearing surface. It sets rapidly, allowing foot traffic in just 3 hours and enabling the application of ceramic tiles after only 4-5 hours at normal