How to build a brick wall
First, put on your respirator mask because sealer fumes can be quite potent. Remove the can lid and mix the sealer thoroughly with a stirrer. Then pour the sealer into your bucket.
Before you start sealing the walls with your roller, cut in the edges using a paintbrush. Cutting in is when you use a paintbrush to paint areas that are too narrow for rollers, like corners, ceiling lines, frames and skirting boards.
Now, pour the sealer into your paint tray and apply to the wall with a roller. Once the wall is covered leave it to dry before painting. Now it's ready for painting.