Strongest clear resin for RC boat

Hello .

My brother wants me to use my resin printer to make a clear rudder for his new RC boat. Only been using my printer 4 months and have not tried clear resin yet.

Considering this is something that will be in the water all the time is there a certain type / brand folks might recommend? Or add hardener to it ? Have not tried anything like that before.

Our Jamg He brand of resin has a really good clear, one thing to note however is that resin will continue to cure in sunlight and will get really brittle.