I have a customer who merged with another gas company, and they are needing to replace or relabel their existing pipeline markers. So they asked me for pricing on a handful of sizes, to the tune of 1,000 pieces or more each. I am wanting to give them a product that is going to last, as well as be easy to apply, because the customer will likely have their own techs do the install. The actual pieces are very small, around 3"x6", so I'm not really concerned with how easy it is to lay, but more along the lines of something with aggressive adhesive that would make cleaning a less critical step in the process. Being a 3m fan, I was hoping to quote some of their high tac vinyls, but they are giving a 5 year life on the ones I've looked at so far. Does anybody have any suggestions with a 10 year outdoor performance with a high tac permanent adhesive? 3m or not, though I would prefer cast either way.