Seal interior concrete water moves easily through porous concrete so sealing interior walls is necessary to prevent moisture from seeping in promoting mold growth and that cold damp basement feel.
Can i seal over painted concrete floors.
Do a 2nd coat possibly a 3rd depending on how thick of a coating you desire.
Allow the cleaned surface to dry.
Several manufacturers produce clear acrylic floor sealers intended for use as a sealer for concrete and asphalt surfaces.
They work well over painted surfaces because of the strong adhesive.
Once that s dried completely overnight turn your goose upright repeat the process from the head down.
Once the desired surface is achieved the floor is ready for a sealer or stain.
Pour the shellac over the bottom covering it completely let it dry.
Additionally high traffic areas on painted concrete floors can show wear.
You can rent a floor buffer from a hardware supply store.
Be sure to start at one side of the room and work toward the door to avoid painting yourself into.
Run the grinder over the surface of the floor applying light force to the pad to scratch the surface of the paint.
I would like to seal the floor with an epoxy based sealant.
Use a masonry sealer such as thoroseal that also patches cracks 35 for a 50 pound bag.
Step 2 buff the concrete surface.
Scarify the floor using a concrete grinder.
This scratched surface will aid in adhesion of the bonding agent and leveler.
The one from quikcrete looked good but it was 23 for a large container and it said the shelf life on it was only a year.
There were none that i could find that you could use over a painted surface.
Acid wash and refinish over time moisture rising under a painted concrete surface is likely to push upward and create bubbles.
The previous owner of my house painted the cement slab garage floor.
A moist surface isn t ideal for further cleaning or painting.
Attach a long arm to a roller brush and begin working the sealant onto the painted concrete floor.
I really don t need much but i was willing to invest in the quikcrete sealer until i read about it being no good after a year.
Now the paint is peeling off and looks bad.