Can Sikadur Crack Fix be used in hairline cracks?
Sikadur Crack Fix can be used in hairline cracks with a maximum crack width of 1/4". If the crack is too deep, the epoxy will simply seep into the crack and not preform well. You can apply sand to limit the depth, but it is important to avoid dust, which will jeopardize the bond. The crack must be clean and sound (loose from debris).