KNAUF AQUAPANEL Joint Filler | Joint Filler for Cement Boards
Joint treatment materialsDescription
A cementitious, bagged jointing compound specifically designed for AQUAPANEL cement boards. Applied by embedding the AQUAPANEL alkali-resistant joint tape (10 cm) to create strong, durable joints for both internal and external use.
AQUAPANEL Joint Filler is a cement-based material for jointing AQUAPANEL cement boards. When used in combination with the AQUAPANEL alkali-resistant glass tape, it creates a joint that is water-resistant and weatherproof, suitable for walls and ceilings, both indoors and outdoors. It is a Class A1 non-combustible material.
Why use a cement-based joint filler:
Cement boards are a different system from plasterboard:
Cement-based filler (this one) + alkali-resistant tape → the correct, water-resistant solution for AQUAPANEL.
NOT gypsum-based filler (Uniflott/Fugenfüller) — not suitable for cement boards/damp conditions.
For interior & exterior use (walls & ceilings).
Overview
Key Features
- Cementitious substrate — compatible with AQUAPANEL cement board.
- Non-combustible, class A1.
- Water absorption coefficient W2 — resistance to moisture.
- Water vapour permeability μ=5 · thermal conductivity λ10,dry ≤ 0.49 W/(m·K) (EN 1745).
- To be used with AQUAPANEL anti-alkali tape (10 cm).
