Staining Older Concrete Podcast

You’re listening to DIRECTCOLORS.COM/LISTEN podcast episode number 26, Successfully Staining Older Concrete. If this is your first time listening, then thanks for listening.  I’m Shawna Turner, General Manager with Direct Colors. This week our Senior Sales Manager and Technician, Justin Richardson, joins us to talk about how to get the best staining results out of an older concrete slab. You may have seen Justin featured in two videos covering this topic on our website, Facebook and YouTube. He’s got some great ideas to share with you today so let’s get started. Welcome to you, Justin.

Justin: Hi Shawna. Thank you.

Shawna T:  What challenges should customers expect when staining older concrete?

Justin: Those challenges will vary depending on whether the project is an indoor floor or outdoor concrete. Interior slabs become harder and denser over time requiring either mechanical or chemical profiling to open the pores and allow the acid stain to readily penetrate the concrete. DCI Hard Trowel Floor Prep is a safe, easy to use product for chemically profiling concrete floors. This will give your best acid staining results on older concrete especially concrete where water does not soak easily into the concrete. Older outdoor concrete will erode over time with exposure to the elements losing some of its surface “cream” which is essential to successful acid staining. If you do have exposed aggregate or sand, that does not mean you can’t acid stain but you may want to apply topical concrete stain like our Liquid Colored Antique to enhance the color after the surface has be neutralized, cleaned and dry and before sealing. Take an honest assessment of your concrete before staining to make sure you have the products you need to do the best job possible.

Shawna T:  Which products do you most commonly recommend for older concrete projects?

Justin: There’s no reason you couldn’t use acid stain on older concrete. It’s one of my personal favorites because it permanently changes the color of the concrete and our customers use it all the time. Sample testing on the slab with proper surface preparation is very important for older concrete projects to make sure you’re going to get the color results you’re looking for. It’s more difficult to achieve a marbled acid stain look on heavily textured, weathered, or rough exterior concrete. Consider using two colors to create more color contrast and movement on the slab. If sand or aggregate is a problem, another option for really beautiful results is the Liquid Colored Antique after you’ve applied the acid stain. After completing all the acid staining steps, apply the antique to dry concrete in a contrasting color to darken the color or accentuate features like cracks enhance appearance. It’s very easy to use. Shake very well, pour into a Fence and Deck Sprayer and apply. Please see our video of a similar application on our website.

Shawna T: What application techniques would you suggest to enhance the finished look and overcome imperfections?

Justin:  I have a couple of suggestions. On interior slabs, no matter what you’ve get color variations on the concrete even if you apply a saturating even coat of acid stain. Existing imperfections in the concrete will not be hidden by acid stain but sometimes those imperfections will work to your advantage instead of against it. Our acid stains, particularly the Coffee Brown, can be diluted with water for the first coat and applied full strength for greater color and texture variation. Older, weathered concrete could definitely benefit from using Liquid Colored Antique to improve the color outcome.

Shawna T: What advice would you offer customers about sealing older concrete and which sealer would you use?

Justin:  When it comes to sealing concrete, you have options. Direct Colors offers both solvent and water based acrylic sealers. Solvents are easier to apply and always make the color “pop” more but because of odor, you have to be very careful about using them indoors. Solvents can also be applied anywhere above freezing and under 85F. Sprayable Satin Finish Sealer is our most popular outdoor sealer and Krystal Kote High Gloss Water Based for interior. Water based Sealers are preferred for indoor use for their low odor but they can’t be applied below 60F at any time. Acrylic sealers are by far the easiest sealers to apply indoors or out and comprise about 90% of the DIY homeowner market for that reason. Please check out our range of sealers on our website and consider your gloss expections as well as the location of the project carefully before selecting a sealer.

Shawna T: Any final thoughts for our DIY audience?

Justin:  Don’t let a project intimidate you. Start small with a patio or an office. Don’t rush or short cut the process. Follow the instructions and sample test on the slab you intend to stain. Take you time. It’s kind of a fun process. Take advantage of the customer services available at Direct Colors. If you prefer not to call about your project, send us a free online design consultation and we’ll get back to you within 24 hours. If you would like to call at 877-255-2656, we have technicians on duty M-F, 8:30-5pm. We’d be happy to visit with you about your project and recommend the best products for your use. We want you to be successful so get in touch!

Shawna T:  Thank you for joining us today, Justin, and for the helpful advice on staining older concrete. Many of our customers have projects like this and are afraid the results won’t justify the work or expense. I hope we’ve changed some minds with this podcast and our listeners will give patio or porch project a try!

To watch Justin’s Staining and Sealing Older Concrete How-to Videos, visit our youtube channel or the how to videos and guides page of our website, www.directcolors.com.

If you have questions, call one of our expert technicians at 877-255-2656 and we’ll help you select the best products and technique for your needs.  If you prefer email, send in a free online design consultation and we’ll get back to you within 24-48 hours. Direct Colors DIY Home Improvement podcasts are produced twice monthly for your enjoyment and show notes can be found at directcolors.com/listen.  Feel free to add the podcast to your favorite RSS feed.  You can also follow us on Twitter, Facebook, Google+ , YouTube and Instagram. Thank you for joining us!


We’re ready to help! Direct Colors DIY Home Improvement podcasts are produced twice monthly for your enjoyment and show notes can be found at directcolors.com/listen.  Feel free to add the podcast to your favorite RSS feed.  You can also follow us on Twitter, Facebook, Google+ , YouTube, Instagram and Pinterest. Thanks for joining us!

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2 comments on “Episode 26: Staining Older Concrete

  1. kathy norgon Apr 22, 2017

    Our townhome association has many cement patios that face north and always form mold on them making them useless for the homeowners unless they constantly clean them. Once cleaned is there a sealer that could be used to seal against the mold that forms. Also many have garage floors that they would like to clean because of heavy dirt and grim that has formed through the years what would you suggest be used to clean floors so that they can be painted and or stained for a better appearance.

    • Shawna Apr 25, 2017

      Thanks for your message. With respect to the moldy patios, you’ll likely need to power wash them to remove the mold and my guess is that they’ve probably already been cleaned with many chemicals over the years. Depending on the current condition, you may or may not be able to acid stain the concrete. If not, another excellent outdoor option would be our Liquid Colored Antique Concrete Stain. We have over 40 colors to choose from should your homeowners wish to have a color option. As for the sealer, I would use the Sprayable Satin Finish Sealer. It is easy to apply and would prevent the build up of mold. It would need to be reapplied depending on conditions once every 2-3 years. We do have a one-time application only penetrating hardener sealerDCI Penetrating Lithium Hardener Sealer option but I’m not sure the patios would qualify as good candidates for this sealer depending on the finish of the concrete and the chemicals used to clean it over the years.

      As for the garage, I would really only recommend the use of the acid stain and sprayable satin finish sealer or DCI Lithium Penetrating Hardener Sealers I mentioned above for those projects. Please read over our how-to guide “How to Acid Stain Garage Floors” for more information on this specific project. Please let us know if there is anything else we can do to assist.

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