Non-toxic way to "seal in" fragrance??

hello,

I am living with MCS/EI and have recently moved into a home which, to my changrin, has fragrance embedded in the floor and walls.
MY QUESTION IS whether any of you have had any luck successfully "sealing" in fragrance in a wall (or cement slab) with paint or other product and, if so, what product did you use? I have never tried the zero-VOC paints so I don't know if those are non-toxic enough to use with MCS. I have a good ozone machine so, if the smell is such that it will respond to ozone, then I could deal for a couple days. I cannot, however, use anything that will take weeks for ozone treatments to clear out.
I have been ozone shocking all the smelly areas for two to three weeks and, although there is some improvement, at this rate it will take another month to be rid of it (if it does go.)

Thanks!

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