Kerakoll Aquastop Nanoflex Single-Component Waterproofing Membrane 20kg

Kerakoll Aquastop Nanoflex Single-Component Waterproofing Membrane 20kg

Kerakoll Aquastop Nanoflex is a certified, eco-friendly mineral waterproofing membrane engineered with nanotech technology to deliver reliable, flexible protection to floors and walls before tiling. Supplied as a single-component, ready-mixed powder, it is breathable, anti-alkali and chlorine-resistant, making it a trusted choice for professional tilers and wetroom installers who need a dependable tanking solution beneath ceramic, porcelain, mosaic and natural stone finishes.

Thanks to its nanotech-enhanced formulation, Aquastop Nanoflex offers permanent elasticity, crack-bridging performance even at low temperatures, and around 30% better coverage than comparable two-component waterproofing systems — reducing material use without compromising protection.

Key Features

• Single-component, ready-mixed mineral waterproofing membrane
• Nanotech technology for enhanced water repellency and permanent elasticity
• Breathable — allows residual substrate moisture vapour to escape
• Crack-bridging, even at low application temperatures
• Anti-alkali and chlorine-resistant
• Approximately 30% better coverage than two-component alternatives
• Low CO2 and VOC emissions, recyclable as inert material
• Suitable for internal and external use, on floors and walls

Applications

Aquastop Nanoflex is designed for professional tilers, bathroom fitters and wetroom installers waterproofing floors and walls prior to tiling with cement-based adhesives such as Kerakoll H40 Gel. It is suitable for bathrooms, wetrooms, shower enclosures, terraces, balconies and swimming pools, and can be applied over mineral and cement-based screeds, existing ceramic or marble tile surfaces, well-anchored natural stone, cement-based plasters and renders, and aged concrete. It is not suitable for gypsum, anhydrite, metal, timber, bituminous sheeting, low-density screeds or inverted roof insulation.

Technical Specifications

• Appearance: light grey ready-mixed powder
• Pack size: 20kg bag with carrier handle
• Mixing ratio: approx. 5–6 litres of water per 20kg bag
• Coverage: approx. 1.15kg/m² per mm of thickness
• Application thickness: minimum 2mm total, maximum 1.5mm per coat
• Pot life: ≥1 hour
• Application temperature: +5°C to +35°C
• Drying time between coats: ≥6 hours
• Curing time before tiling: ≥24 hours
• Full cure: approx. 7 days (14 days for permanent water exposure)
• Substrate residual moisture limit: ≤4%
• Shelf life: approximately 12 months in original, unopened packaging

What's Included

Each pack contains one 20kg bag of Kerakoll Aquastop Nanoflex powder with an integrated carrier handle for easy handling on site. For a complete tanking system, use in conjunction with Kerakoll waterproofing tape and corner pieces at joints, corners and pipe penetrations.

FAQ

Is Kerakoll Aquastop Nanoflex a single or two-component system?
It's a single-component, ready-mixed powder — simply add water and mix. There's no separate liquid resin component to measure out.

Can I tile directly over Aquastop Nanoflex once it's cured?
Yes. Once the minimum 24-hour curing period has passed, ceramic, porcelain, mosaic and natural stone tiles can be fixed directly on top using a suitable cement-based adhesive.

Is it suitable for shower enclosures and wetrooms?
Yes, Aquastop Nanoflex is widely used for waterproofing shower enclosures, wetroom floors and walls prior to tiling.

How many coats do I need to apply?
A minimum total thickness of 2mm is required, applied in coats of no more than 1.5mm each, so most applications need two coats with at least 6 hours drying time between them.

Can it be used outdoors?
Yes, it's suitable for internal and external applications, including terraces, balconies and swimming pools.

What substrates is it compatible with?
Mineral and cement-based screeds, existing ceramic or marble tiles, well-anchored natural stone, cement plasters/renders and aged concrete. It's not suitable for gypsum, anhydrite, metal, timber or bituminous surfaces.

Millcot is a trusted UK trade supplier of professional tiling, wetroom and construction materials. All products are sourced directly from manufacturers and supplied to trade professionals across the UK.