Alchimica’s Undertile Waterproofing System is specially formulated to provide seamless, durable protection beneath tile finishes on external areas such as balconies, terraces and walkways.

These exposed areas are highly vulnerable to water infiltration, which can lead to tile delamination, concrete damage and even structural deterioration over time. The HYPERDESMO® liquid membrane forms a fully bonded, elastic waterproof layer that protects the substrate while accommodating movement and temperature fluctuations.

Key benefits include:

• Seamless, joint-free application ideal for complex or irregular layouts.
• Highly flexible membrane that resists cracking under thermal stress.
• Excellent adhesion to concrete screeds and cementitious substrates.
• Vapour-permeable (where required), allowing the surface to breathe while remaining watertight.
• Compatible with tile adhesives and ready for direct tiling once cured.

Whether used in residential or commercial projects, Alchimica’s undertile system ensures long-term waterproofing integrity without altering the aesthetics of your tiled finish, making it an ideal solution for new construction and refurbishment alike.