While homeowners may not be aware of this, any Tempe, Arizona concrete company knows that moisture is concrete’s biggest enemy. If your concrete is not sealed, or if the seal is wearing down, moisture can seep into the surface and cause damage. To prevent this you’ll need a Tempe concrete contractor to periodically seal your surface. You can test if it’s time for a re-application by sprinkling some water on the concrete and seeing if it soaks in. Aside from water, concrete can also become unsightly from oil or grease stains, rotting expansion joints and the development of cracks. Luckily, these can usually be easily repaired by an expert contractor.