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Refinishing stained concrete and overlay
Posted on 2/2/17 at 10:15 pm
Posted on 2/2/17 at 10:15 pm
I had a slab poured a few years back. Then afterwards acid stained and sealed. It looked great for about a year, but now looks like a faded speckled whitish mess. I don't know if the sealer was crap or if it's just age, but it needs some help. So, do I need to pressure wash it off or buy some sort of stripper to rid the sealer before applying a new one?
Also, I have an overlay that was put down over washed aggregate. Also stained and sealed. It has cover on it so It still looks decent, but is somewhat dull. I'm afraid to pressure wash it too aggressively.
Any input on this would be appreciated. I've found some videos on stained concrete redo, but nothing on overlay.
Also, I have an overlay that was put down over washed aggregate. Also stained and sealed. It has cover on it so It still looks decent, but is somewhat dull. I'm afraid to pressure wash it too aggressively.
Any input on this would be appreciated. I've found some videos on stained concrete redo, but nothing on overlay.
This post was edited on 2/2/17 at 10:17 pm
3
Posted on 2/3/17 at 8:30 am to Columbia
If you bought the sealer at Home Depot that's probably what happens. Professionals don't use that stuff
Posted on 2/3/17 at 8:42 am to Columbia
Efflorescence
sounds like hard water was used to mix the concrete wen it was poured. Efflorescence is natural in new masonry and concrete and eventually stops, you have to keep washing it off. However, sealing the surface traps it under the sealer. You can use a walk-behind sandblaster to clean it off and restain/reseal.
Also, we have a thinset bomanite-like topping over the concrete around our pool. Its origianl tot he house (20+ yrs) and is cracked and chipping. pressure washing @ high pressures flakes it off. Wish they never put that down.
sounds like hard water was used to mix the concrete wen it was poured. Efflorescence is natural in new masonry and concrete and eventually stops, you have to keep washing it off. However, sealing the surface traps it under the sealer. You can use a walk-behind sandblaster to clean it off and restain/reseal.
Also, we have a thinset bomanite-like topping over the concrete around our pool. Its origianl tot he house (20+ yrs) and is cracked and chipping. pressure washing @ high pressures flakes it off. Wish they never put that down.
This post was edited on 2/3/17 at 8:45 am
Posted on 2/3/17 at 9:47 am to Easternrio
Any rec on what to re-seal with?
Posted on 2/3/17 at 10:06 am to Columbia
use this
Prosoco Cure & Seal Remover
then sandblast and restain. Reseal with this Prosoco Guard SXT
this is commercial-grade stuff, about $100 per gallon, but it is the best and what I specify for clients (hospitals, universities)
if you're in MS, you can get it here:
LINK
Prosoco Cure & Seal Remover
then sandblast and restain. Reseal with this Prosoco Guard SXT
this is commercial-grade stuff, about $100 per gallon, but it is the best and what I specify for clients (hospitals, universities)
if you're in MS, you can get it here:
LINK
Posted on 2/3/17 at 10:20 am to Duckhammer_77
Thanks man. Huge help
Could I pressure wash instead of sandblast? And what type of sprayer should I use for application?
I know I have to spend $$ for good results but looking at being economical as well.
Could I pressure wash instead of sandblast? And what type of sprayer should I use for application?
I know I have to spend $$ for good results but looking at being economical as well.
This post was edited on 2/3/17 at 10:32 am
Posted on 2/3/17 at 10:24 am to Duckhammer_77
quote:
You can use a walk-behind sandblaster to clean it off and restain/reseal.
Well that sounds like fun.
Posted on 2/3/17 at 10:37 am to Columbia
use the chemicals and pressure wash first by all means. THEN see if you need to step it up to a sandblaster rental. Bottom line is that to fix your original problem of the salt and mineral content leeching out to the concrete surface, you have to remove the sealer that's trapping it on the surface of the concrete. Then pressure wash off the mineral scale. Unfortunately, the chemical stripper could also degrade the stain color. Check with HD or Lowes to see if they carry something that can do this--doesnt have to be Prosoco, but the good stuff that works costs $$.
This post was edited on 2/3/17 at 10:44 am
Posted on 2/3/17 at 7:32 pm to Duckhammer_77
makes sense, but baton rouge has very soft water. i'm fighting the same thing right now, but it is in a living space. looks like shite
Posted on 2/8/17 at 12:37 pm to Duckhammer_77
I'm wanting to put something down on my concrete porch. What do you recommend? Expoxy? Any particular concrete paint?
Posted on 2/8/17 at 4:25 pm to 17theBears
My concrete back porch is similar to the OP's. Decided the easy thing to do would be to paint it. Nope..not good at all 
. shows the dirt, impossible to clean and eventually comes up. I just finished (today) stripping the paint. Now I'm trying to figure out how to remove the sealer and stain so I can put something else down. I don't recommend paint.
. shows the dirt, impossible to clean and eventually comes up. I just finished (today) stripping the paint. Now I'm trying to figure out how to remove the sealer and stain so I can put something else down. I don't recommend paint.
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