What is that gray putty behind exterior fixtures?
I am replacing a light fixture on my aluminum-sided, Forest River trailer. What is that gray putty, and where can I get more when I re-install? Thanks!
Forum Discussion
There are two types of grayish putty tape. One is butyl and the other is not butyl. The butyl tape is sort of stretchy and the other is not. The non butyl tape may be called mastic tape but I am not sure about that.
