I don't remember how the batteries loaded, but so long as you could replace batteries I would think some kind of epoxy or silicone would do it. It was pretty bright as I recall, but I didn't use it long enough to be able to say much for it's durability. I do know that some of the little headlights made for bicycles which are pretty bright and very inexpensive were a waste of money for me. Maybe for a sedate ride on a pedal cruiser, but for a motored bicycle they need to be pretty durable as mine would shut off and I'd have to reach down to turn it on again... I never spent the money for the expensive ones. Now I make my own head and tail lights and buy 6 volt LEDs as components to wire up myself using the engine magneto and a back up of battery power if the engine quits. I don't much care about turn signals, but I do like a brake light and use a brake lever made for electric scooters which activates when you depress the hand lever... very sure set up that way, but lots more hassle than what you are looking at in this little unit. For the money it is probably worth a try. Good luck.
SB