I've been getting lots of questions regarding sealers. I know it can be overwhelming.
Remember to use like products.
Oil based paint with oil based sealer
Same with water based. However, there seems to be confusion over polycyclic and polyurethane. They sound alike and are water based. Not difficult to not quite understand the differences.
Polyurethane can be much more tricky to get on without streaking. Several light coats would be recommended. I however typically use polycyclic as I find it easier to work with. Application is key as always.
Here is a link to explain the difference from world renowned Bob Vila. Hope this helps.