My 2016 21' Classic has some type of adhesive substance on the white pex supply line where it comes out of the wall from under the bed into the bathroom. This line goes from the wall over to the commode. I noticed the adhesive substance had pulled away about 50% from the wall. My questions are: #1 what is the purpose of this adhesive? And #2-What can I use to replace it with? Thanks in advance for responses.