What doesn't paint stick to?

[Jerry]

I don't want paint sticking to something, mainly concrete. I'm tired of the vandals tagging everything in sight. So, what can I coat the concrete with, so paint won't stick?

Thanks

[clare]

Pro Industrial? Anti-Graffiti Coating® from Sherwin Williams. It's a siloxane? coating - fast drying, clear, and slicker than goose poop.

[Eddie]

is that good for floors, too?

[Bill]

Maybe there is more information about the product at their web site?

[clare]

Not likely. Too slick

[Stormin Mormon]

It would probably wear off after a while. But we could find some local nursing homes, and try it there. When the oldies arrive for chow time, see how many remain standing.

[Stormin Mormon]

Is this a wall, or surface people walk on?

Perhaps you can set up box traps, and release the vandals on the other side of the river? Bait the non lethal traps with Iphones, and ghetto blaster radios. Shoot the vandals with tranquilizer dart, and then release miles away with a colorful, harmless radio transmitter collar so you can track their movement. For example, trap the red colored Crips, and relocate them into the blue colored Bloods territory, where they will easily and effortlessly integrate with the other eco system. If the vandals are brown color, relocate them into upper crust housing developments where George Zimmerman lives. Or David Duke. That should reduce the incidence of migration. If the vandals are white, relocate them to inner Detroit.

[nestork]

Yep, "siloxane", that's the magic word to say it's a silicone based plastic.

And, the wonderful thing about silicone based plastics is that nothing sticks well to them, not even another silicone based plastic. Try getting something to stick to silicone bath tub caulk. Even brand new silicone caulk won't stick worth a crap to old silicone caulk, and that's the reason that on a lot of DIY Q&A forums (like this one) you get newbies that are exasperated trying to replace the silicone caulk around their bath tubs. The new caulk simply won't stick for some reason and they don't know why. And, the reason why is because they haven't removed the old silicone caulk COMPLETELY. Even after scraping with a razor, there's still a very thin film of silicone sticking to both the tub and tile. Unless and until they remove ALL of the old silicone caulk with a gelled solvent like "Silicone-Be-Gone", they'll never get the new silicone to stick. But, once that residual film of silicone is removed, the new silicone will stick to both tub and tile like chewing gum sticks to the underside of a church pew!

[Larry W]

Motor oil, reapplied every few days, ought to do it.