Silicone is designed for structural movement, and it is used in places where grout is not suitable. For example, the floor & wall joint
and the vertical uprights of a shower require silicone to prevent cracking to the grout as grout is not flexible and will crack in an expansion joint.

Silicone also provides a watertight & airtight seal, resulting in less damage being caused behind the tiles. 

Please contact us for more information.