Hello:

Moved into a new house that has a "slot" cut out of the garage
ceiling plasterboard. About 5 inches wide by about 6 feet in length.

Think it was for some plumbing repairs a long time back.

Would like to seal it up, and re-plaster it.

Saw the product(s) by Hyde called "Wet & Set"

Some kind of roll of tape that you wet and apply to the plaster.
Guess there is an adhesive in iot, and is supposed to grab onto
the existing surface of the plaster, and provide a rigid "bridge" over the
opening that one can then plaster onto.

Anyone ever use this stuff ?
Caveats in using it ?

Is there a better way ?

Does it work, etc. ?

Please see the link to it:
http://paint-and-supplies.hardwarestore.com/50-276-tapes-beads-and-patches/wet-and-set-5-x-9''-drywall-repair-roll--611775.aspx

BTW: Not competent in plastering: what type and brand of plaster (or is it
called spackle ?) should I use ?

Thanks,
Bob