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re: Refinishing stained concrete and overlay
Posted on 2/3/17 at 8:42 am to Columbia
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
1
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.
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