Cempolay

Bostik Cempolay is a protein-free self-levelling compound that's suitable for smoothing and levelling interior subfloors prior to laying decorative floor coverings. It's ideal for use on concrete, sand/cement screeds and unglazed ceramic tiles.
 

When mixed with water, it produces a fluid, easily-levelled compound that can be trowelled to a feater edge. Foot traffic can be accepted in 2-4 hours and floor coverings can be laid from approximately 16 hours, depending on conditions.