Graeme wrote:
Just fitted a new bath and there is a gap between the bath and the two end
walls of approx 1.5cm. Will Silicone fill this size gap, and to what depth?
Or should I use some other type of filler with a silicone 'top coat'?
When the walls have been tiled, I'll be adding an L shaped seal anyway, but
I thought the extra sealant/filler would add to rigidity/stability.

Silicone will fill it, but don't rely on it to seal. Make sure you get
your final seal, with the L profile, really watertight.

--
Grunff