So far so good
November 12, 2013
I ordered this as it seems to be the longest lasting sealant, which is the downfall of most headlight restoration kits. You can use any kit of your choice to restore the plastic, then use this as the sealant instead of the supplied sealants with the kits. At this price though, I didn't want to waste any in a foam pad for applying it, so I transferred it to a small spray bottle. I think I used only 3 sprays per headlight and it spreads itself out to layer the whole thing, and was easier to put on than wiping it on, and probably leaves a thicker coating. BUT, this product cannot be left in a spray bottle, as the next time I checked it, it had completely hardened in the bottle. It's something I should have seen coming, and I don't blame it on the product, but in the future may just be applying it with a foam applicator.
As far as longevity, I have seen the customer's car I did after about two months, and not a hint of yellowing yet. For a comparison, another customer's car I detailed at the same time in the same complex had some noticeable yellowing of her headlights. I didn't do a headlight restoration, but the yellowing came out almost completely just during the polishing process on the car itself, but two months later the headlights are pretty yellow again. So for the short 2 month span I was able to witness, there is definitely a difference between Opti-lens vs. no sealant at all.