How To Clean Stamped Concrete
It is highly recommended that you thoroughly clean the concrete before applying the sealer. Many people say that the concrete “looks” clean and that it just needs to be rinsed off. However, there are oils and contaminants in the atmosphere that adhere to your concrete that rinsing will not remove. If you have previously used an acrylic sealer an oily residue is created as these sealers breakdown. This needs to be washed off to allow for better adhesion of the new sealer.
Using SealGreen Oil Cleaner /Degreaser thoroughly cleans the surface and assures a suitable surface to apply the sealer. It lifts and removes dirt, oil and other residue from the surface, not only removing visible dirt but also cleans out any open pores of the concrete which may look clean but hide dirt and prevent the sealer from sealing properly. If your outside concrete is covered with black mold and /or mildew then the recommended cleaner is SealGreen Mold and Mildew Cleaner. Neither cleaner will damage landscaping or harm pets or people.
Step1 - Apply Cleaner
To use SealGreen Oil Cleaner / Degreaser or SealGreen Mold and Mildew Cleaner, apply the cleaner with a low-pressure, hand-pump sprayer with a fan tip. Allow the cleaner to penetrate for about 10 minutes and then rinse the cleaner off with a garden hose or a pressure washer. Make sure that the cleaner has been thoroughly removed and no residue is left on the concrete. The surface should feel clean to your touch. How to Clean Stamped Concrete video
Step 2 – Allow to Dry
Regardless of what type of sealer you use on stamped decorative concrete, a dry surface is the key to success in sealer application. Allow the concrete to dry for at least 24 hours after washing. Not allowing the concrete to fully dry will cause the applied sealer to turn milky white where there is humidity under the sealer.