Flagstone turned white and flaking

by Jason
(Ventura, CA)

We have flagstone around our pool and deck. Had a local company come out a year ago and seal the flagstone. Now the flagstone has turned white. In some areas a layer of the stone is actually flaking off. Any ideas on how to clean off this stuff. I tried muriatic acid full strength and it helps, but doesnt completely get off the old sealer.

Comments for Flagstone turned white and flaking

Click here to add your own comments

maybe "white scum remover"
by: David

Hi Jason,

There's a product called "white scum remover" from Prosoco that might help you with your problem-. We haven't used it, so you should call them at 1-800-255-4255. You can see details here:


You will also want to seal your stone after you remove the white scum. Prosoco also makes some quality sealers for your situation.

Pools can cause problems for stone. Read these comments from people with the same problem as you:


Great luck!


Click here to add your own comments

Join in and write your own page! It's easy to do. How? Simply click here to return to Flagstone Question.