i was wondering if i was to put some silicone over the holes in the rim to let air in and out would that seal them from getting water in them?
Yeah it should, but the air trapped inside the tires would probably make them bouncy. You could always remove it if you did not like the result though.
Rusty 2.5R,T-max 2.5 & 3.3,Summit VXL Nitro 4-tec
would this also make the truck float because of the air trapped inside the tires.
Yes but no, i tried it and it handles TERRIBLE! You could try it but your going to be flipping a lot!