said by mackey:No, you must still wet sand and goop up the aluminum before inserting and tightening the screw. Fail to do so and it becomes a question of how long you have before it burns up (which may be just minutes if you didn't strip back to clean wire first). Aluminum is a PITA to terminate right which is one of the reasons it's now banned (by some AHJ's) for 15A/20A branch circuits.
If you strip back on the conductors there is really no need to "wet sand" the conductors. And these splices have "the goop" pre-installed.
I have used literally hundreds of these splices for over 25 years on sizes from #8 to 600MCM with not one failure or even compromised connection. And they can be re-used.
I don't fall for aluminum wiring scare tactics because I know better and I know the truth. Unfortunately the same cannot be said for most DIYers and laypeople.
