How to apply ProSeal Li™ Penetrating Concrete Sealer
Test it, clean and dry the concrete, then spray and back-roll one wet coat. The same steps as the data sheet.
Coverage200 sq ftAbout, per gallon. Rough, porous concrete takes more
Surface tempAbove 45°FAnd 5°F above the dew point
CoatsOne wet coatMore only if the water test says so
Foot traffic12–24 hoursDry to the touch in 4–12 hours
1
Test and prep
Not over an old sealer. Start with a small test area.
Do the water test first
Pour a little water on the bare concrete in your test area.
Soaks in and darkens
The concrete is open. You’re ready to seal.
Beads up, no darkening
A sealer or coating may already be on it. Don’t apply ProSeal Li™ here.
Sits on a shiny slab
Etch it with CitrusEtch™ to break the sheen, rinse, then test again.
- Seal when the air and the surface are above 45°F and the surface is at least 5°F above the dew point.
- Keep the jug at 70–90°F before you spray, for the best flow.
- New concrete? Let it cure 21–28 days first.
Over an existing sealerBare, porous concrete
2
Clean and dry
The concrete has to take it in, so remove anything in the way.
- Remove dirt, oil and grease. Use ProClean Degreaser™, a rust stain remover or etch, as the dirt needs.
- Rinse well with a pressure washer, about 3000 psi.
- Let it dry completely.
- Indoors? Rinse in several passes and pick up the water with a wet vacuum.
3
Spray and back-roll
One generous wet coat, no puddles.
- Use a low-pressure sprayer. Wet the surface generously so it can take in the sealer.
- Don’t let it pool.
- Back-roll right away to spread it evenly and pull it out of low spots.
- It’s ready to use. Don’t add water.
Wet and evenPuddlesDon’t add water
Very old, weathered or porous concrete?Once it’s fully dry (24 hours), do the water test again. If the water still soaks in and darkens it, spray and back-roll another coat.
After you seal
Dries to the touch4–12 hours
Foot traffic12–24 hours
Fully dry24 hours
Vehicles48–72 hours
Not for standing waterDon’t use it where the surface sits under water or is submerged.
Coating it later?Use a quality acrylic, oil-based, epoxy or urethane coating. Not latex.
Storing the jugKeep it sealed, out of the sun, at 40–90°F, and don’t let it freeze.
What you’ll use
sq ft
About 200 sq ft per gallon. Rough, porous concrete takes more.
ProSeal Li™ Matte
CitrusEtch™
ProClean Degreaser™Questions? Call (877) 255-2656
Read the label and the safety sheet (SDS) before you start, and test a small area first.
