How to Caulk a Basement Wall

Basement walls are typically made out of either cinder blocks or concrete slab. These durable materials last a long time without requiring maintenance. However, if you notice a crack forming, it is important to take action as soon as possible to prevent the crack from becoming larger. Concrete repair caulk works well in minor wall cracks. You apply it directly. When it dries, it expands and seals the crack.

Wire brush
Concrete cleanser
Sponge
Concrete caulk
Caulk gun
Utility knife

Instructions

- 1
  Scrub a wire brush over the crack in the basement wall, to remove loose chips and dirt. If the surrounding wall is exceptionally dirty, scrub it with a concrete cleanser and sponge. Allow the area to dry.
- 2
  Insert concrete caulk into a caulk gun. Cut off the caulk tube's tip using a utility knife so the hole's diameter is approximately the same as the crack's width. Angle the cut slightly so it smooths the caulk bead as you apply it.
- 3
  Place the tube's tip at the top of the crack. Pull the caulk gun trigger and slowly drag the tip down the crack. Hold the tip tight against the basement wall to force the caulk into the crack. Allow the caulk to dry, according to the manufacturer's directions.

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