I recently started using a water based product called Ican Grepp V. This is a hybrid paint (ie acrylic based with alkyd oil added) for priming, sealing and undercoating.
I’m not always a fan of hybrid paints as they tend to be sticky and will soon gum up brushes and equipment. It is difficult to remove as well because the paint isn’t soluble in just one solvent. Water will get most of it but not all. This then shortens the life of the brush and make long spells of application a chore.
Enter Ican Grepp V. It applies easily, with good open time and opacity. It also levels well, though I would have expected that. What I didn’t expect was the way it washed out of brushes, a Corona Ryan and Cody, with the ease of a pure acrylic product. No sticky residue, just a nice clean brush after a few washes with detergent.
This product is great for priming under water based paints, I used Eico Gloss, because it offers the adhesion of a hybrid with the ease of use of an acrylic primer undercoat.