This joint where your basement wall and floor meet is known as a cove joint.
Seal concrete floor wall joint.
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After the walls have cured the basement floor is poured leaving a similar tiny gap known as the cove joint between the cured walls and newly poured floor.
You can seal these joints but you must ensure that the seal does.
Learn why not and the best options for keeping water out of the cove joint by reading below.
What is a cove joint.
Under ordinary circumstances this gap is too small to admit water.
Installing the proper kind of concrete joint sealant will help protect the structure from moisture damage caused by rain wind gravity capillary force and surface tension.
Unfortunately you can t just seal the gap between your basement floor and wall to fix it.
Occasionally as the concrete settles the joint may widen causing leaks or serving as an entrance for insect infestations.
Using concrete joint sealant to seal concrete expansion joints and concrete contraction joints in concrete floors and concrete walls is an important part of maintaining the integrity of the concrete.
All it takes is backer rod and concrete flex sealant.