Knauf FPA fire-retardant acrylic is a fire-retardant, one-component and partially flexible acrylic mass, designed for fire sealing. Under the influence of high temperature, the mass swells, ensuring an effective seal against fire, smoke and gas. Acrylic hardens under the influence of weather conditions, but remains flexible to some extent in order to ensure the mobility of the joint. It swells under fire exposure to form a fireproof seal.

Technical data

• reaction to fire class D-s1, d1
• specific gravity 1.56-1.60
• expansion under fire conditions 1: 2-3
• coating formation time up to 25 minutes
• time in a viscous state maximum 75 minutes
• full hardening 3 to 5 days depending on the thickness of the layer and the ambient temperature
• elasticity of 12.5% in accordance with ISO 11600
• durability / properties class Z ₂
• thermal conductivity 0.845 W / mK +/- 3% at a depth of 20 mm
• operating temperature from -20 to +70 C
• application temperature from +5 to +30 ° C
• fire resistance EI 30 - 120, Annex A, ETA-18/0933 and ETA 18/0932