What is the Black Stuff Between Concrete Slabs: Identifying Expansion Joint Fillers
When observing a concrete driveway or sidewalk, one may notice a black material filling the spaces between the slabs. This black substance is known as a ‘joint filler’ or ‘sealant.’ It serves a vital purpose in the structural integrity and longevity of concrete installations. The material accommodates the natural expansion and contraction of concrete, which […]
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