We just finished our bathroom but after using the shower i decided to pop off the bath panel to make sure there was no leaks round the silicone only to find that there is water getting through from the black plastic bolts underneath the taps....the space is too tight to get a spanner in to nip them up further....they are tight enough that the taps dont move so could i just silicone them up underneath and if so whats the best and strongest available that i could use.....cheers