When most of the chemical
reaction is complete, a layer of colored residue with
a mildly acidic pH will remain on the surface. This
layer must be thoroughly cleaned off with a scrubbing
machine and water mixed with detergent so the sealer
will bond properly when applied to the surface.
Water-based sealers, in particular, have little tolerance
for residual acid. Using pH paper or pencils to test
the surface pH is a good way to ensure that conditions
To the water-and-detergent cleaning mix, add a tablespoon
of baking soda per gallon of water to neutralize any
remaining acid. Scrub with a buffing machine using
soft buffing pads (green or white) or a scrub brush,
and pick up the residue with a wet vacuum. Rinse until
the water is clear. Allow the floor to dry 1 or 2
days before sealing.