There is also another GE Silicone II K/B Supreme that is "mold-free product protection helps keep the cured caulk mold- and mildew-free and looking clean for 10 years, with regular cleaning." Here is a link that might be useful: GE Silicone II K/B Supreme

Have you looked at the spec sheets on the website? I clicked on the first one and the spec sheet came up. It gives a graphic with measurements and states specifically the cabinet size it is made to fit. HTH! Here is a link that might be useful: C-Tech sinks

I don’t think you will have a chipping problem in a bathroom. I have marble and no problems.

Well…of course you can do it--you can do almost anything if you're willing to take the trouble, but it seems to me pretty pointless to use godmorgon in this situation. You'll definitely lose the whole top drawer and may have to lose a good part of the bottom drawer, too, because of the plumbing. Godmorgon is very easy to adapt for vessel type sinks, but not so much for this. I'd honestly look for another brand that comes with an undermount sink already. This is going out of your way to make your life harder for less benefit. Personally, I wouldn't do godmorgon unless I was willing to use the ikea sinks meant for them. This look is popular enough that you should have plenty to choose from. Check out Duravit--they used to have a lot of vanities in this style, although I haven't looked lately.