Ceresit CL51 liquid foil-5kg
What is Ceresit CL 51?
Ceresit CL 51 is a ready‑to‑use, flexible liquid waterproofing membrane designed for sealing surfaces in wet and damp areas before tile installation. It forms a seamless, elastic, and highly durable waterproof layer that protects substrates from moisture penetration.
CL 51 is ideal for bathrooms, showers, kitchens, laundry rooms, and other wet zones, as well as balconies and terraces when used in combination with sealing tapes and accessories. The 15kg bucket provides excellent coverage for professional‑scale projects.
Key Features
Ready‑to‑use liquid waterproofing membrane
Flexible and crack‑bridging
Forms a seamless, watertight coating
Fast‑drying and easy to apply
Ideal for wet rooms, showers, and humid interiors
Suitable for balconies and terraces (with accessories)
Excellent adhesion to mineral substrates
Compatible with Ceresit sealing tapes (e.g., CL 152)
15kg bucket – professional coverage for larger areas
Technical Specification
| Specification | Detail |
|---|---|
| Product Type | Liquid waterproofing membrane (“liquid foil”) |
| Weight | 5kg |
| Consistency | Ready‑to‑use paste |
| Use Areas | Interior & exterior (protected areas) |
| Applications | Wet rooms, showers, kitchens, balconies, terraces |
| Substrates | Concrete, screeds, plaster, plasterboard, cement‑lime surfaces |
| Function | Waterproofing, crack‑bridging, moisture protection |
Application Checklist
Prepare the substrate Ensure the surface is clean, dry, stable, and primed if required.
Apply the first coat Spread evenly with a brush or roller, covering all surfaces.
Reinforce critical points Embed Ceresit CL 152 tape in corners, joints, and transitions.
Apply the second coat Once the first layer is dry, apply a cross‑directional second coat.
Allow to dry fully Ensure complete curing before tiling.
Install tiles Use a suitable tile adhesive once the membrane is fully set.
Where to Use Ceresit CL 51
Bathrooms and wet rooms
Showers and walk‑in shower zones
Kitchens and utility rooms
Balconies and terraces (with sealing accessories)
Plasterboard walls in humid areas
Under‑tile waterproofing systems
Renovation and new‑build projects
Why Installers Choose Ceresit CL 51
Professionals rely on CL 51 because it delivers:
Reliable, long‑lasting waterproofing
Fast and easy application
Excellent flexibility and crack‑bridging
Strong adhesion to common substrates
Seamless protection in all wet‑area systems
It’s a trusted waterproofing membrane that ensures safe, durable, and watertight surfaces ready for tiling.