Replacing 5th wheel Landing Gear

Mine is sealed with a gray expanding foam.

Thanks all. Black caulking it will be.
I thought maybe it was some type of super goop used by the rv industry.

Silicone can not be painted. Use the correct color of sealant for the job

I used black silicone when I had to replace my jack that had a faulty seal. Be sure you get it good so no mice get in. If you need more than one coat, it is fine.
COLOR: TO MAKE MY POST CLEAR. THE SILICONE WAS USED INSIDE THE FRONT COMPARTMENT OF MY 5ER. CAN NOT BE SEEN.

Yeah, what he said. Mine doesn't even have caulk where it goes through the floor.

Just use black caulk