It used to be that when we wanted to attach something to our aluminum hull we had it welded. This requires special equipment and a skilled operator, not to speak of all the attendant mess and paint damage. Not anymore, we now use Plexus.
Plexus will stick to just about anything, and without much, or in most cases, any surface preparation. Hard to believe, I know, but we have used it and it works. It even adheres aluminum to itself and to other materials. (A primer is recommended for aluminum, but not required.) We have used it to install a depth sounder transducer into an aluminum hull.
But Plexus is not just for big projects. Our latest use was to glue stainless steel nuts and washers to the soon to be inaccessible back of some wood cabinetry to take the machine screws that hold grab rails. Sure, we could have used epoxy and the nuts might even have stayed stuck if we cleaned everything perfectly. With Plexus we just gooped up some nuts and washers, stuck them on and an hour later they were a permanent part of the cabinetry. We did not even make sure that the nuts and washers were a good fit to the wood since Plexus has great gap filling. We treated the machine screw threads with Tef-Gel.
There is just one drawback with Plexus: It is highly toxic and the fumes are particularly noxious. Don’t even think about working around this stuff without a well fitted respirator with new organic cartridges, eye protection, and gloves.
Plexus is a two part product with a 1:1 mix ratio, which comes in many different formulations with kick times that range from a few minutes to several hours.