Rust-Oleum 301012 Concrete Patch & Repair, 24 oz, Gray

Why it's worth it

A two-part epoxy mortar in a 24-ounce kit, meant for cracks and holes rather than thin seams. It cures hard without shrinking and takes paint or coating in about eight hours, which makes it the practical choice when a crack has grown into a divot.

Once a crack widens into an actual hole, sealant stops being the answer. You need fill volume, and a cartridge doesn't have it. This kit gives you 24 ounces of two-part epoxy mortar that you mix, trowel in, and level flush. Owners patching garage floors before laying down a coating consistently pick it for exactly that reason.

It cures without shrinking, which is what separates it from cheap patch compounds. A filler that pulls back as it dries leaves you a hairline seam around the edge of every repair, and water finds that seam. This one bonds and stays put. One owner reports rolling three-thousand-pound pallets over a patch repeatedly without it failing.

From our review of 8 concrete crack repair kits for driveways, by David Sinclair, Managing Editor

What we like

• +Once a crack widens into an actual hole, sealant stops being the answer
• +It cures without shrinking, which is what separates it from cheap patch compounds
• +The eight-hour window to paint or coat is the scheduling win

What to know

• –Trowel work is a skill, and this demands more of it than squeezing a tube
• –It stays tacky longer than the label suggests
• –Getting a flush, level finish often takes a second pass after the first one settles