Hi.
Haven't used Ultra Deep Shine Polish myself so this is third hand
.
Not sure if this helps but maybe it might ...
https://www.detailingworld.co.uk/for...d.php?t=415327
and here's another thread with some recommendations
https://www.detailingworld.co.uk/for...d.php?t=391004
If you're looking for an easy to use and quality sealant this is worth a go (from my favourite supplier):
https://www.car-chem.com/shop/hydrocoat-hybrid
Good Luck.