Foam Sealer...also
 

Thanks for the responses! I have not touched anything as of yet... with
what I plugged the opening up with... & being that one side touches a
white sheet rock wall & the other side a light wood grain counter that I
put together. Would it be that I would use an electric sander to just
file it? Thanks! Mindy

Foam Sealer...also
 

Whether this is removed or not... how long will it last? Thanks! ..Mindy