WRONG WAY

JUST TOPPING IT OFF

The chemical complexity of concrete curing is beyond the scope of this page, but it is important to understand that although Portland cement can form a hard matrix around aggregate (sand, etc.), it has only weak adhesive qualities. Consequently, simply buying a bag of concrete or sand mix and applying it to a worn concrete surface will not stand up. It may look okay immediately after cure, but you’ll soon see delamination.