This cement-based joint treatment system offers a comprehensive solution for repairing, waterproofing, and leveling joints and surfaces. It is designed to fill cracks and wide joints up to 40 mm using a hydrophobic, flexible, and abrasion-resistant mortar suitable for demanding internal and external environments. The system further incorporates a rigid, cementitious waterproofing layer with excellent adhesion, ensuring effective preparation of existing or tiled substrates for subsequent applications. It is completed with a smooth, trowel-applied, zero-shrinkage leveling coat that provides a uniform surface ready to receive final finishes.