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Painted exterior brick does not usually need sealing. Brick is a porous material, so you don’t want to apply a sealant that could trap moisture inside the bricks and cause erosion and structural damage. The risk of moisture-induced damage after sealing is higher in colder climates where trapped moisture can expand if it freezes. On the other hand, it makes sense to seal really old brick or kitchen backsplashes, where moisture from cooking can weaken the brick.

Drilling into brick or mortar requires the use of a masonry drill bit. Masonry drill bits appear similar to standard drill bits except for the leading tip of the bit. The tip has a bulky carbide arrow-shaped end slightly larger than the rest of the bit shaft. Standard or high-speed drill bits designed for making holes in wood or metal don’t have the ruggedness or design shape you need to drill into brick. They may not go through the brick at all, and if they do, they’re more likely to overheat, crack, or dull before you finish drilling.

Do not use super glue to hang lights on brick unless you want your lights up year-round. Hot glue is a better choice because it’s easily removable with a small amount of rubbing alcohol. Super glue is very hard to remove, and you could tear off parts of the brick in the removal process.

Removing paint from brick can have both aesthetic and practical value. Some people prefer the timeless look of bare brick, making it worthwhile to remove old paint layers. Brick also lasts longer when unpainted, as paint traps moisture, causing the brick to deteriorate more quickly. If your brick walls are already in bad shape, stripping the paint off might do more harm than good.