Have bought the pressure sprayer to prime new plastered interior walls and plasterboard in the house per spray quickly and effectively. I have used standard primer from the hardware store (usually so pink stuff). I had a little concern that the pressure sprayer would stick at the latest after the first long break. In fact, he may even days and weeks are with undercoating liquid and is then still perfectly use. And, although I have not gotten down the foundation of my fingers felt weeks! A good product, you can buy peace of mind and will not be offended.