One of the substances that will not bother the Tillandsias is Liquid Nails
(a number of Tillie growers in this area swear by the stuff). Elmer's Glue
is another. We have used both with great results, in conjunction with the
above mentioned pantyhose strips or thin telephone wire (from a cable which
contains multiple wires).

My husband has two lengths of driftwood covered with Tillies, and we have
other bromies growing elsewhere. They're pretty hardy, unless the squirrels
or racoons decide to munch on them.

Diana