Leak in camper

[cruiser1701]

The DW and I just got back from our shakedown cruise in our new to us 23lb,and we encountered lots of heavy rains while we were out. One afternoon I was sitting in the dinette listening to the radio and I noticed that there was a small drip coming from the cabinet where the radio/DVD player is at,I'm suspecting it's from the radio antennae .... So my question is this... If that is where it's coming from what do I need to use to seal it up?

[Radio]

You'll probably want DICOR lap sealant, comes in regular and self-leveling. The regular stays where you put it. The self-leveling is a bit "runny" and spreads out evenly (sort of) before setting up. Both are easy to use in a caulking gun, fairly cheap and available at any RV supply outlet. The chemistry is made to work with your rubber roof.

If this is a used trailer I'd get 3 -4 tubes and take a "shotgun" approach. Also look for cracks in skylight bubbles, plumbing vents, that sort of thing.
Inspect the seams along the end-caps and look for tears in the roof membrane.