Plastic cable ties for aquascaping

[Reef_Ready]

I've been looking at the best ways to aquascape live rock and most sites (people) seem to recommend using a pvc pipe frame and securing the LR with plastic cable ties. My question is do these things hold up over time given the UV in the lighting and the saltwater environment? Anyone seen these things fail after a period of time? [img]images/smiles/icon_confused.gif[/img]