Stained flatwork question

[SigristPW]

I have a job to do in the morning. The customer has stamped and stained concrete the sealer is probably 5yrs old (don’t know if that matters) anyways the concrete had mold and algae on it. My question is......"Is it ok to use 6% bleach and turbo nozzles with low psi to get this off. I don’t want to go there and have the bleach make the sealer cloudy. This is my first stain concrete I don’t want to mess it up.<?xml:namespace prefix = o ns = "urn:schemas-microsoft-comfficeffice" /><o></o>
Thanks for any advise.<o></o>

 

[A-PLUS]

House wash mix and low pressure rinse should do the trick. Don't use the turbo nozzle.

 

[SigristPW]

Will the turbo nozzles damage it? even on low pressure

 

[Danny Bates]

Turbo nozzles won't spin very well if at all with low pressure. Are you wanting to strip the sealer off? If not, don't use the turbo nozzle.

 

[PressureWashE]

spray down your house wash mix, maybe make it a hair stronger, let the solution dwell, and use a low pressure rinse to loosen the mold and dirt like a 45 degree nozzle at no closer than a foot from the surface, if you need to re apply go ahead, but dont use the turbo nozzle, sealer that old will come off easily

 

[rmhinkle]

Agree, just DS it and then low pressure rinse. I've done it and it came out great. I also cleaned a stained patio for my aunt and she wanted me to use the surface cleaner... I told her it could take some color out but she insisted. It lightened the color... haha She didn't care at all and it actually looked 10 times better but moral of the story is pressure can take some of the color up