Wet Room Waterproofing

Alchimica’s Undertile Waterproofing System for wet rooms is specifically engineered to provide robust, seamless protection beneath tile finishes in areas exposed to continuous water contact. Ideal for showers, bathrooms, kitchens and wet rooms, the system ensures long-lasting performance and protection against moisture-related damage.

Developed through Alchimica’s ongoing investment in advanced polymerisation and manufacturing technologies, the system combines cementitious waterproofing mortars and liquid-applied polyurethane membranes to create a complete waterproofing solution suitable for modern interior wet room design.

Key advantages include:

• Highly flexible and crack-bridging membrane, ideal for movement-prone substrates.
• Strong adhesion to cementitious substrates and compatibility with tile adhesives.
• Rapid application and curing for reduced downtime.
• Moisture and vapor resistance, preventing water ingress and protecting building. elements

The system is applied prior to tiling, forming a secure waterproof base layer that ensures both the longevity of the tile finish and the protection of underlying surfaces — making it an essential solution for residential, hospitality and commercial wet areas.