AST L is the answer to the increasingly stricter thermal insulation requirements withits lambda value (ʎ=0,038W/mK), and fire resistance. The optimization between the thermal insulation and the thickness of the panel in external walls is possible without any compromises to the strength properties. Out of all Paroc Panel System's products AST L has the highest thermal insulation value, lowest weight and extremely high fire resistance. Well-known PAROC quality.