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Old 07 September 2016, 03:30 PM
KirkMcD KirkMcD is offline
Join Date: 22 March 2001
Location: Yorktown Heights, NY
Posts: 1,102

Originally Posted by RichardM View Post
Looks like the residue of previously installed no slip strips. They were glued down and that is the left over glue.
I have that in my tub. It's some kind of non-slip surface.
It gets really dirty though.