Sonax Netshield. Applied 3 months ago, endured a very snowy / salty / sandy winter, and was last washed 3 weeks ago! I'm quite impressed with Netshield.
Sonax Netshield on my plow truck. Also applied 3 months ago but over WDGPS. Also endured the nasty winter! And I'm almost positive the Netshield is still mostly intact.
WG Exterior trim sealant on my tonneau cover. Applied 3 months ago.