Expanding module, large

Expanding foam modules to replace a casing in the sealing compound system if part of the casing has been lost. The modules expand by the factor 10 when sprinkled with the impregnating fluid, closing gaps and joints between the cables installed.
After the cables have been impregnated they are hardly flammable, fire- retardant and self-extinguishing.
Stored in a dry environment, the expanding modules have an unlimited lifespan.