Does anyone know how to remove solidified Gripfill?
Can't be sure, but it looks like it might be Gripfill. Someone has attached carpet gripper extrusions to a concrete floor with some sort of paste/glue which has squeejee'd along the length of the gripper. Light brown appearance, and pretty solid.
I wondered whether there was a chemical agent which could deal with this, or if it's hard graft with a chisel.
PoP
Sending email to my published email address isn't guaranteed to reach me.