When you're done, clean the brick using a stiff wire brush and a mix of equal parts powdered soap and salt, and enough water to make a paste. Wash down with water and seal with one part PVA to five parts water. This will trap dust and protect the brick while allowing it to breathe, and won't look shiny.

What is the best sealer for brick?

Unless you want to purposely change the appearance, the best sealer for brick walls is a non-gloss penetrating clear sealer. A siloxane-based formula like Masonry Saver Water Repellent or SuperSeal-M will penetrate deeply into most masonry brick walls for optimal protection.

How do you seal exposed brick walls?

Interior Brick Sealer & Dustproofer is easy to apply with a brush, sponge or microfibre cloth. For large areas, the sealer can be applied with a low-pressure sprayer, fitted with a coarse nozzle. When spraying, take care to remove runoff by distributing excess sealer with a brush or roller.