Numerical natural haloz countertop

Hello,

we have purchased the above-mentioned worktop!
I sanded it three times and treated it with Behandla!

However, the worktop is still not 100% satisfactory, as you can see in the picture (water stains).

What can we do now?
Is there a way to seal the worktop?

You will not get rid of the stains by sealing. Only sanding more aggressively will probably help.