Wall tiles to worktop sealing ?

[Smallfry]

While the weather isn't great, I have been doing some tiling in the utility room. Bought the tiles nine years ago, and keep putting it off

But anyway, I have left a gap of 4mm between the tiles and the worktop which will need sealing with some mastic fantastic. I have always used silicone before, but it always seems to "let go" in places after a while, no matter do well I clean the surfaces, and then develop mould.

The all singing and dancing "prevents mould growth" sealers never seem to work after a year or so either, so I am wondering whether something like CT1 might be a better bet ?
Not had it, or similar products come unstuck yet. Only downside I can think of, is that as its an adhesive, if the worktop ever needs replacing, its going to make it somewhat difficult, and will end up pulling the tiles off the wall as well.

Of should I "stick" to silicone ?

 

[Craig-SM]

Dowsil 785 and use a smoothing tool.

 

[iNf]

Forever Clear/white

 

[Agroshield]

Perhaps do the work in two stages.

Fill flush to the front of the tiles (masking tape on the work surface). Let it cure. Then run a second bead along and tool to 45 degrees.

As above, the 785 is a good one. CT1 is a good get you out of trouble product, but it is not a great silicone - hard to tool nicely.

You need to make sure every bit of grout residue is removed off the tiles - use a dark cloth and wipe until it is clean.

Push a foam filler strip (or corrugated cardboard) into the 4mm gap when you are grouting so it does not become filled with grout.

As a step zero, make sure the wooden worktop is also well sealed. Perhaps mask it at the toe of the 45 degree fillet and shellac behind there including under the tiles.

 

[Bulldog_]

I silicone all the time and use various cheap smoothing tools like these Clicky

The Dow silicone is good.

Or you could use sticks like this guy Clicky