The range of Isotex formwork blocks can be supplied with a smaller thickness of Neopor® BMBcert graphite EPS insulation from BASF. This allows the thickness of concrete cast to be increased, when necessary for structural reasons. This type of blocks is available on request. REI 120 fire resistance – Reaction to fire B, s1-d0 – facade fire reaction (Lepir2 test) Acoustic insulation in class I- Energy class NZEB/ZEB (0 emissions).