my wheel wells are rusty and leaks water into my trunk, and i cant fix it now because winters going to hit and dont have enough time. is there anything i can put on the inside of the trunk to seal it off until i can work on it again?

You could stuff it full of plastic. It wont stop it completely but will slow it down.

never thought of that, im gonna have to try it. but i was thinking more along the lines of a spray?

Depends on the size of any holes. I've seen some big enough to put your fist threw. A option is truck bed liner.

There are undercoating sprays, but depending on the size of the holes you might have to stuff them with something like Danthurs suggested.

they are decent sized unfortunately. on the one side its like the trunk is seperating from the wheel well a little bit .i just dont want too much water to get into my trunk and then have it freeze when winter hits ya know. but im for sure going to put the plastic in there and hopefully it will hold most of the water out

you could take some galvanized steel that is a bit larger than the hole put a bead of silicone around the outside edges and then take some self tapping screws and screw the sheet of steel into place. My wheel wells are shot too..... something that have been putting off for a while but i know i need to get it done, that was my plan

does yours still have rocker pannels, unlike mine lol