Troublesome silicone install

Do the faces of the matt tiles need sealing with something-or-other at the edges, where the silicone is to be applied? Could they be porous and are exuding some form of grease/soap?

David

I expect this is probably the case... I did suggest that he try some Lithofin stainstop on them first, but I doubt that will happen.

Perhaps I ought to mask of the section where the bead will go and spray it with something before next applying the silicone.

Stand in the tray as if having a shower and see if the gap under the tiles increases by a large amount. We had similar probs with our bath due to springy old floorboards underneath.

Pete

How about painting a little superglue on to see how well it sticks to the tiles?

cheers, Pete.

AFAICR that doesn't fare well with water, does it? David

No, its rock solid...

(good suggestion though! ;-)

AFAICT it's waterproof:

cheers, Pete.

Yes it will behave like this.

The tiles should have been treated with two coats of Lithofin MN Stainstop before silicone goes near it.

I tried the experiment recently both ways with some limestone. No sealer and the silicone doesn't adhere properly. Use Stainstop and it does.