kitchen sink problem

[choystory]

Hello , I wonder if anybody has any bright ideas for how to fix this problem I have with my sink installation.

We had to install the kitchen ourselves due to severe lack of funds and whilst I managed most things ok I can't see how to fix this. I have posted photos, it's an Ikea Boholmen sink that isn't an inset so it is the whole width of a worktop, instead of sitting in a hole that you cut, it's sort of an all in one unit.

The problem is that the silicone I put in the surface gap between it and the cut end of the worktop keeps coming off with several wipedowns every day and is letting in water, that is swelling the worktop. I have re-applied the silicone 3 times in 6 months so it's not very effective!

is there some other more effective way I could seal this?

Sorry for such a boring problem but I'd really appreciate any pointers as I have drawn a complete blank from web searches and B&Q!!!

thanks

Did you treat the cut end of the laminate? I believe my kitchen fitter used a PVA sealant from concentrate. It was meant to be watered down by quite a bit but he left it very thick as he didn't want it wet.

I know you have reapplied the sealant so did you remove the old sealant fully and wipe it down with methylated spirit before applying the new sealant?

Have you tried a different brand or tube of sealant if your is failing?

Honestly, sealant is exactly what I would use too.

white silicone sealant should do it. I have a feeling that it is not sticking to the chipboard of the worktop. There might be grease, soap, detergent or something preventing adhesion.

it would be difficult to clean up the edge surface because the sink is in the way. Are you able to remove either the sink or the piece of worktop?

I think I would prefer to paint the chipboard edge (after cleaning, and smoothing off with sandpaper) with white oil-based gloss paint, which will give a good surface for the sealant to stick to, and will also prevent water soaking in.

You should remove the sink and seal the edge of the worktop on both sides with a silicone to water proof it.
On the join, silicone will stick to stainless but not forever.
Its not the same as sealing a bath , with stainless it will come lose after time and if you are cleaning/wiping it constantly it will lose tack faster

Thank you all so much! I think I will have to take it apart a bit and try to seal the edges of the work top definately to help it withstand any leakages, and reapply. It's all really useful advice so thank you!