Oxalic Acid

[Mark 8262]

Are any of you using oxalic acid, can you apply it when the concrete is wet & dry or only when the concrete is dry. Thanks for the help.

 

[ckingclean]

Always pre-wet before applying acid. If you use acid on dry concrete it will soak way down into the concrete making it hard to remove and possibly causing damage.

Pre-wet so the acid works on the surface and not down in the pores. Don't pre-wet to much though. Standing water will dilute your chems.