"How do you attach a basket to a SS kitchen sink? I have seen some
that recommend silicone and others that use putty. What's best? "
If you're talking about installing a drain into a sink, the only
correct material is plumber's putty. Roll it into a long rope, about
1/4 inch in diameter, then place it around the drain. As you tighten
the nut from below, the putty will slowly squeeze out, filling the gap
and firmly seating the drain.