the bottom line is that for the type of aluminum wire that is a
problem, there is no real good solution. the tool is indeed never sold
(only rented) and only rented to electricians and then only after you
take a class and get certified to use the tool (and probably sign a
bazillion waivers).

there are some wire nuts available that have some antioxidant compound
in them but purportedly they are not a good solution either.

since you mention canada, i gather you are there and there are no
certfiied users there anymore. that should tell you a lot.

the aluminum wires now in use are a different alloy than the small
gauge wiring that caused some fires a few years back, so the tool used
for that particular wiring is probably not appropriate for what you
want to use it for. utilities do not use small gauge wire in any case.