Installing Undermount Sink with Just Adhesive

On a previous inquiry, someone suggested these:

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I recently had three new vanity countertops installed with undermount sinks and the installers used only adhesive to attach them though the sink basins came with clips, but I don’t know what adhesive they used.

I asked my plumber BIL about this and he said it was OK to do this though when he installed sink basins he usually used the clips. He just warned me if I had to stand on the countertop, say to change a vanity light fixture bulb, not to step inside sink basin.

Man I'd just bite the bullet and use some clips... do it right once and never worry again

When I installed mine I used pressure treated 1X on the front and back to create a wedge to hold the sink up while the adhesive cured. They were in their so tight I would have had to use a pry bar to get them out. They are still there today.

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On a previous inquiry, someone suggested these:

LINK

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That was me, unless there was another person with the issue. I bought those and the sink is not going to come loose again. Highly recommend.

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Man I'd just bite the bullet and use some clips... do it right once and never worry again

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This. Silicone will not hold up that sink with time, especially in an outdoor setting. What I do is apply a bead of strong urethane construction adhesive and mount the sink with a frame using 2x4's, lengths of all-thread, and required nuts/washers. Give it 24 hours then apply epoxy-on clips using anchoring epoxy. Then apply silicone caulk to the inside seam and give it a solid day or two before using it. You want something you can put a 20lb turkey in to prep, not just rinse stuff...