How to Repair Concrete

Other than earth movement, moisture is the main cause of cracks in concrete. Here's how to deal with moisture damage.

Difficulty: Moderate

Instructions

Things You'll Need:

• Bonding Agents
• Pointing Trowels
• Wire Brushes
• Sealant
• Concrete Caulks

1. Clean out cracks of any size as best you can, using a wire brush or even a strong spray of water.

2. Fill small cracks (less than 1/8 inch) with caulk specially made for concrete. (Be sure cracks are dry before caulking.)

3. Fill larger cracks or small holes (less than a few inches) using patching products designed for concrete. These usually are in the form of a powder that is mixed with water. They typically expand as they dry and become very hard.

4. Apply sealant or paint to the concrete.

Tips & Warnings

• Patching compounds generally work better if the crack is damp or wet.

[Rocki]

on 7/22/2009 The best concrete patch i ever used, inside and out was Belzona. Amazing stuff, expensive but you do it one time.

[barnrestorer]

on 2/3/2009 You make it sound so easy! Thanks!

[mcbethd1]

on 12/3/2008 I HAVE MILDEW ON MY SEALING,IT DOES SHOW IN THE SUMMER,
BUT AS SOON AS THE WINTER HITS,IT SHOWS.WHAT CAUSES THE
PROBLEM?AND HOW CAN I FIX IT