Silicon rubber (VMQ and FVMQ) is a highly versatile elastomer that can be used in the most diverse sectors. The industrial grades of silicone rubber are generally based on polydimethylsiloxanes partially substituted with other mainly alkyl, vinyl and phenyl organic groups. The former regulates the processability, the latter the crosslinking and the last properties at low temperatures. In the case of flour silicone rubber, one of the two methyl groups is replaced by a trifluoro propyl group. The introduction of these fluorinated substituents improves resistance to fuels, solvents and apolar oils, and low temperature properties. The incorporation of reinforcing fillers, typically amorphous or precipitated ventilated silica.