I've managed to cut my Zenith Caldeira worktop and I'm using the epoxy resin supplied for the biscuits and butt joint. What's the recommended adhesive to stick the whole worktop to the base cabinets?
https://www.worktop-express.co.uk/solid-laminate-worktop-installation-instructions Yes you are correct, according to the link you use silicone.
There isn't a best silicone for this job. Any silicone will do, the weight of the worktop will certainly send any silicone off nice and hard. At the end of the day it's only there to stop the worktop from moving.