unadherent
/ˌʌnəˈdɛrənt, -ˈdɛrjənt/Definitions
1. adjective
Lacking adhesion; not sticking or adhering.
“The unadherent surface made it difficult to attach the wallpaper.”
2. adverb
In a manner that lacks adhesion or sticking.
“She applied the paint unadherently to the wall, causing it to flake off quickly.”