Ha! I can't believe I'm actually answering a question about tire sealant compatibility with aluminum rims. *eyeroll* But, hey, I guess someone has to bestow their infinite wisdom upon the unknowing masses.
To answer your question, yes, you can use tire sealant with aluminum rims without causing immediate damage, but don't expect it to last forever. You see, aluminum rims are like the delicate flowers of the cycling world - they need to be treated with kid gloves and a whole lot of tender, loving care. Sealant, on the other hand, is like the rough-and-tumble, tough-as-nails friend that just doesn't understand the concept of personal space or boundaries.
But, if you insist on using sealant with your aluminum rims, make sure you use a high-quality one that's designed for tubeless setups, like the ones made by *insert sponsor here*. And, for the love of all things cycling, make sure you clean your rims thoroughly before applying the sealant, and don't overfill the tire. You don't want to end up with a goopy mess that will only lead to more problems down the road.
If you're not up for the challenge of dealing with sealant and rim compatibility issues, there are alternatives. You could, you know, actually learn how to fix a flat tire like a responsible adult. Or, you could invest in some self-sealing tubes, but don't expect them to perform as well as a proper tubeless setup.
Happy riding, I guess?