From General, these finishes are the best water based finishes we have ever used. Formulated to resist foaming and prevent sags, they wont run like ordinary water based finishes. Tack free dry time is only 15 minutes. Dry time between coats is 2-4 hours, so you can finish a project in short order. High Performance Polyurethane, HP, contains all the characteristics of a Poly/Acrylic blend, but also a UV stabilizer to protect it from breaking down in sunlight. This is, without a doubt, the best water based polyurethane on the market today.