Semi-rigid URSA TERRA T18R/T18P mineral wool panel, according to EN 13162 standard, non-hydrophilic with high mechanical performance, without coating. Supplied in panel and rolled panel . The product is recommended for plasterboards walls and ceilings. Properties: Reaction to fire: A1 Thermal conductivity coefficient:0.035 W/mK; thermal resistance R=1.30 [m2K/W] -thickness 46[mm], thermal resistance R=1.40 [m2K/W] -thickness 50[mm], thermal resistance R=1.85 [m2K/W] -thickness 65[mm], thermal resistance R=2.40 [m2K/W] -thickness 85[mm], thermal resistance R=2.85 [m2K/W] -thickness 100[mm], thermal resistance R=3.40 [m2K/W] -thickness 120[mm],