Press one on and pull it off, evaluate the coverage and back butter if it is
not good enough. It may hold well with voids but might crack due to lack of
support. If this is an edge molding or similar, fill it up.


wrote in message
ups.com...
1/4x3/8" U shaped?

These are thick porcelain tiles and have large voids on the back.
Wondering if I would be better off back buttering them?