below the finished concrete surface, as opposed to randomly throughout the slab. In indoor construction, crack fillers have evolved to transfer floor loads between slabs and protect the slab edges ...

A small concrete slab doesn’t cost much to DIY ... using a trowel or flat shovel, to fill voids. If the form appears to be full and the surface is even, use a hammer to gently tap the form ...

Used to fill interior random cracks, control joints or new construction joints on horizontal concrete surfaces Designed ... accommodates small slab movement Protects vertical edges from spalling ...