Great post by Tony above, and I love this forum because I try new things based on discussion I read here.
So I went ahead and used Pinnacle Glasscoat window sealant on top of 8-month-old PBL Glass Coating. The coating was still working fine but it’s been on so long that I couldn’t remember if it used to shed water better when it was new; in other words wasn’t sure if it has degraded at all. Both cars have been through Pittsburgh winter and now a very wet, T-storm prone spring.
So it’s not like the windows needed the sealant but I have it and want to use it and the Pinnacle glass cleaner with repellent up eventually to increase shelf room. Applied the Pinnacle Glasscoat. I figured I can ride the summer out using up the sealant and repolish for a fresh coating before winter.
Luckily, and one of the things I love about northeast whether despite what anyone complains about, the weather always changes. In came a massive T-storm last night.
Side note, I often take my 3 year old out for a drive before dinner to change it up for him. This gives me opportunity to go storm chasing in the spring. No tornadoes here, but plenty of dark storm clouds to drive towards if I plan the drive at the right time. He loves it, as do I because I get to watch my cars LSP and windows in action (dork!).
So we get caught in this massive storm and I instantly see what SWETM refers to above. At low speeds the sealant looks good and large drops are gathering and moving up the windshield. But there also thousands of tiny splatters that accumulate, causing this ‘cloudy’ effect on the windshield. Not a big deal at low speeds but it is a highly noticeable difference from the coating as I get over 30-40 mph.
My overall observation summary: I like the 8-month-old coating behavior on my windshield more. It may be the same as brand new coating behavior, I don’t recall. It groups drops into larger drops that get out of my eyesight’s way. The fresh sealant leaves lots of tiny traces of splatter everywhere that accumulate and appear as a foggy/cloudy effect when not wipered away soon enough. I posted earlier in the post that the behavior of RainX and the coating are the same but I take that back now. Pinnacle Glasscoat behaves like RainX, in my memory.
Nonetheless, for those that do use RainX, it’s still great for the price and even though I’m nitpicking above, protecting your windshield with RainX OR coatings makes rain driving waaay easier and safer than using nothing at all. Sorry for the rant.