How to Fix Concrete Acid Stains
Expert Tips on Solving Acid Staining Issues
Find Concrete Stains
Decorative concrete expert, Chris Sullivan, provides in-depth answers to common problems associated with acid staining concrete. Find answers to common questions and ask your own questions.
Fixing Concrete Stain Penetration Problems
I recently stained a 5-year-old concrete floor. The owner of the building had rubber mats down on the floor near the front entrance for 4 years. After staining, I noticed the stain was significantly lighter in color in exactly the same spot where the rubber mats had been. What caused this, and how can it be fixed?
Acid Stain Spots – Touching Up Problem Spots
How do I fix areas on acid stained floors where the color has worn away? I also need advice on touching up spots that did not take the stain at all. I tried spot staining them and it only made them look bleached. The floors have not been sealed, only waxed.
Acid Stain Reaction – Will Bond Breaker Inhibit Reaction
We have a project where the owner would like to install a stained concrete floor in the lobby of an office. Tilt-up wall panels will be cast on the floor slab, and the contractor is concerned the bond breaker will inhibit stain reaction. Can you please review and give recommendations?
Acid Staining Basics
I install a lot of driveways and patios, and some of my new customers are asking for stained concrete. I've never tried applying acid stains. What are the basic steps, and how can I avoid problems?
What is a True Concrete Stain?
There are so many products on the market these days labeled as concrete stains. How do you know you are getting a true acid-based stain?
Blending Acid Stain Colors
What is the best way to apply two colors of acid stain? Does it matter whether the light or dark color is applied first?
Why Does Stain Wash Away?
I applied a dark brown acid stain to six-month-old concrete yesterday. When I came back today to neutralize the stain, it all washed off. What can I do to get the stain to take?
Exterior Staining when Rain is Forecast
I acid stained a driveway today and plan to return tomorrow to clean and neutralize the surface. We are expecting rain tonight. Do I need to cover the driveway with plastic or do anything to protect the surface because of the rain?
Avoiding Acid Burn
What causes the permanent droplet and pour marks when acid stain first hits a concrete surface, and how do I avoid them?
Do Admixtures Inhibit Stain Color?
We seem to be experiencing more and more concrete slabs that are not taking acid stains, even when we grind them first with a #150-grit diamond disc....
Is It OK to Use an Acid Wash Before Staining?
I get very different answers on how to properly prepare a power-troweled concrete surface for application of acid stains. Some people say never to use an acid wash to open the pores for staining and others say it's OK to use an acid wash of 10 parts water to one part acid. Who's right?
Concrete Stain Overapplication Issues
After a couple of months, the stain and sealer began flaking off and scratching away under chair legs. What factors would contribute to the failure of the finish, even after reapplication?
Hole in a Stained Concrete Floor
I have a 2x2-foot hole in the middle of my beautiful stained and scored concrete living room floor caused by jack hammering to repair a water leak under the foundation. Any Suggestions?
Drawbacks to Acid Staining Green Concrete
What is the drawback of acid staining a residential concrete floor the day after the concrete is placed, rather than waiting the suggested 28 days? Is this recommended waiting time the same for both acid and water-based stains?