Fire protection cable sealing mortar S90 3kg. Fire protection mortar for the production of cable sealings of fire resistance class S90 according to DIN 4102, is used to close openings in internal walls and ceilings (min. F90, according to DIN 4102-2) through which cables and lines are routed and prevents the transmission of fire and smoke through these openings for a fire resistance period of 90 minutes. Approved by the building authorities, approval no. Z-19.15-2161. Note: Can be combined with fire protection cushions.