[epereira]

I have sealed my colored patio, but get white "coudiness" on the surface. I assume this is from the sprinkler water on the patio (the patio is stamped). Is there an easy way to get this whiteness off without power washing and resealing?

[JudyKayTee]

Is it concrete, Unilock, something else?

If the "cloudiness" is due to mold or mildew you can use bleach and water - I believe it's 1/4 bleach and 3/4 water.

There are also professional products which are made for just this type of problem.

Did you use a sealer which was recommended by the manufacturer?

[oneexception]

Well, if possible, you want to correct the problem before powerwashing and resealing, or you may need to do it again. Do your sprinklers run off well water? Or do you have a whole house water softener? If yes, it may be deposits from the water. If no to both, something in your city water may be reacting with the sealer. Could also be efflorescence if your concrete patio is still relatively new.

[epereira]

It is a poured cement stamped patio with a color that was sprinkled in the cement top. I have city water (my sprinklers bypass the softener). I use a very expensive sealer (high gloss)after powerwashing. The cloudiness comes out within a month of the sealer being applied. We have very hard water, so I am assuming it is calcium from the water. I am hoping there is something I can scrub the patio with, not to hurt the sealer or plants/lawn