Quick Answer: How Do You Fix Discolored Concrete?

What is the best way to clean concrete?

Vinegar is the go-to natural cleaner and it works on patios.

Mix it equal parts of vinegar and water to clean stains, or use full-strength vinegar on heavily soiled patios.

Baking soda is another good natural cleaner.

Mix 1/2 cup baking soda to one gallon of water for a gentle cleaning solution..

What’s the best chemical to clean concrete?

Muriatic acidMuriatic acid can work wonders on filthy concrete (and it can also be very useful in cleaning excess smears of dried mortar and grout, or when attempting to alleviate tough rust stains).

Can you stain concrete that has already been stained?

You can restain concrete if it’s already been stained, but it won’t be as rich of a color, as it may not take in all areas of the concrete. The color of the layered stain will be different than the swatch you see for stain on a naked concrete base.

Why is my colored concrete turning white?

Efflorescence is a chalky white salt residue that can occur with any product containing cement. As moisture migrates up to the surface of the concrete, it carries along with it calcium salts from within the concrete. When the salts reach the surface, they react with CO2 in the air and form insoluble calcium carbonate.

How do you treat discolored concrete?

For more severe discoloration, try using a mild acid solution (1% to 3% muriatic acid) Start with a mild concentration, since muriatic acid will remove concrete as the concentration increases. Use just enough to remove the discoloration.

Why is my concrete discolored?

Calcium chloride in concrete is a primary cause of concrete discoloration. … Concrete surfaces that are troweled too early will increase the water-cement ratio at the surface and lighten the color. Concrete which is not properly or uniformly cured may develop discoloration.

Can stained concrete color be changed?

Since the color comes from a chemical reaction, there is no easy way to change the color of acid stained concrete; you can add another layer of concrete on top and stain this a completely new color, or you can add to the existing stain to deepen it and possibly change the hue slightly.

Will straight bleach harm concrete?

Bleach is safe to use on concrete. When applied to concrete, bleach does not harm the sturdy material. However, it does remove spots and unwanted matter from the surface, such as mildew and moss. … Depending on your cleaning project, you might combine the bleach with detergent, dilute it with water or use it straight.