2 yrs ago a contractor acid stained my 12 yr old concrete patio. It was a disaster (some spots the stain did not take at all). He did not seal it because it did not turn out well - he gave me my money back and told me to paint it. After researching, I now know that he did not prep it correctly - just power washed it - did not clean with a degreaser, etc. At this point I just want to paint it. Can I paint over this unsealed stain? If so, what do I need to do (prep, etc.)? Do you have recommendations on type of concrete paint to use - one that will last as heavy patio furniture will be dragged across floor? As an aside I tried to power wash it recently and some of the stain actually came right off. Other areas are still very dark and will not come off. Thanks so much for any help you can provide. Gail
Have you looked at what types of epoxy floors you can put over it? I am not to well versed in the technical jargon but I know that I like the way the look. There might be a style out there that looks like a concrete stain too.
01:09PM | 01/08/15
Acid stains are tough and his prep was not to far off except for skipping the degreaser. That could result in mild areas, though the concrete itself may just not take stain in areas. A strong pressure washer can remove some stain because it is actually removing a small amount of concrete surface. Be careful with pressure washers! These days, paint is an option, but it is, well, paint. Boring. Since you wanted a unique look originally, you can still achieve that with another type of concrete stain. Water base concrete stains were more or less invented to fix bad acid stain jobs. Water base stains are so easy to apply over existing stains. They are semi transparent and just blend right in to the existing background. The surface is already etched from the previous endeavor. You can use one or more colors to correct what is needed and then seal it up when complete with a quality concrete sealer. In fact, with their ease of use, this type of concrete stain is becoming more popular than acid stains due to its predictability. Perfect for the DIY who wants to dress up their plain gray. The stains are usually not a big box store item, but more found at a local concrete supply store or most easy on the web. Tru Tint WB is the one I have had the most luck with.