I use a few too...
OPI Axxium Top Sealer for l&p on clients who have no problems, but can only be applied on product, gel, microwrap or l&p
OPI Microbond UV Seal, which can be applied on anything but has a tacky residue
OPI UV Cure (I think it's the correct name) for those who want to take thepolish off and apply another in between infills. no sticky layer after as it can be either drying on air either cured with the lamp
they never yellow nor look violet under a UV lamp (ie in disco)
I used the UV 30 Ezflow but it would make the nail look blue-ish, and get purple under a UV light and I hate that