Although, you can use any sealer. Two coats of Bona Natural seal is recommended under Bona Naturale for a raw wood look. If, you are leaning towards white. Use two coats of Nordicseal.

Thanks. We want light vs white. Considered NordicSeal but installer was worried it dries so fast and we have a lot of wide open connected rooms.

Finishes with a whitener is tricky to apply in general. You do not apply it using traditional methods. Otherwise, you will run into finishing issues.

If, the product is drying too fast on him. He needs to change his approach.