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How are you addressing cracks?
09-14-2011, 07:07 AM
Post: #19
RE: How are you addressing cracks?
Some polyureas are HARD, while some epoxies are really soft. Don't let the name fool you.

Anything you use must be more flexible than the concrete and have some elongation properties so if the crack moves the filler stretches and doesn't crack. If the filler is too strong the moving concrete will still cause a crack, just in a new area that may be much worse than if it is kept on a nice straight control joint.

Keep in mind that no epoxy mitigation manufacturer will warrant the cracks. Some want a filler placed before the epoxy so the epoxy is continuous over the filler. Some want the crack filled with epoxy and if it has space remaining after the cure they call out filling the void with a flexible epoxy, polyurea, two-part urethane caulk or similar traffic bearing flexible repair.

Active joints are rare but yes, if they are designed to move you have to allow them to move.

JD Grafton
Concrete Answers for Flooring Problems
[email protected]
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RE: How are you addressing cracks? - CC Solutions - 09-14-2011 07:07 AM