The assembled SISMO system is a continuous monolithic concrete system without fire leakage through the assembled system. This is specified in the European Technical Assessment. 

The polystyrene used is self-extinguishing in compliance with the DIN 4102 rules. SISMO building technology allows the use of alternative infill materials. Fibre cement board, for example, can be used on the inside of a lift shaft.

Fire resistant tests carried out on different types of SISMO modules have given very satisfactory results.

Test reports can be supplied upon request.