The wooden plugs covering the screw heads around our slide out would occasionally pop off. I would put them back in with a rubber mallet but certain ones would still pop off. I did not want to glue them or silicone them in just in case they ever needed to be removed.
Problem solved - I wrapped the ends in teflon tape (plumbers tape), put them back in and now have a nice tight fit but can still be removed if necessary. Not one popped off during our latest trip.