I love how people take this vapor barrier stuff to the edge of infinity.
I remember when I took my contractor license test... 18 inch overlap doesn't even require sealing with tape. If your concrete, or subfloor, or really any space is putting out enough moisture vapor to get past a simple overlap of poly then you have a much more serious problem than the correct tape.
Almost all of the "stucco tape" and "sheathing tape" I found is for temporary hanging of plastic. The Intertape brand has one that says it's specifically for sealing vapor barriers so that's what I used. But to be honest... I felt like duct tape works better. I found some duct tapes that were rated to bond 20 yrs. That Intertape bonded well, but not as sticky and nasty as duct tape. I called on manufacturer of "sheathing tape" they said bond is only good for 2 years MAX.
The very best thing to do is call the manufacturer tech line for the wood/laminate or other covering and MAKE SURE you are talking to a tech guy and NOT a rep/sales rep. Ask for the nerdy guy, he has all the legitimate answers.
I've installed LOTS of different products and many of the instructions for those different products give conflicting advice. Your investment is safe if you follow the instructions for YOUR product.
PS.. one of the manufacturers specifically says to seal the seams with good ole duct tape. :-)