Concrete floor sealer

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Concrete sealers and coatings are intended provide protection against heavy traffic, abrasion, chemicals, and moisture exposure. They also can beautify the surface, simplify maintenance and improve skid resistance. Most also reduce pitting, cracks, and stains. In general, a concrete sealer has a penetrating formulation or a less viscous topical solution that seeps into the concrete or is suspended on the surface, while a concrete coating on the other hand sits on the surface of the concrete and builds up and protects through the layers of coatings.

Concrete Sealers:

  • Silicates: Either a sodium, lithium, or potassium carrier that seep into the concrete, chemically react to form dense calcium silicate hydrate; no VOCs.
  • Silane/Siloxanes: Water repellents that form a hydrophobic barrier to seals out moisture while chemically bonding with the substrate.
  • Acrylics: Water-based or solvent-based decorative sealers that enhance the surface and repel water; UV stable; inexpensive; easy application; often need recoating in 3-5 years.

Concrete Coatings:

  • Epoxies: Provides thicker coating with exceptional hardness and impact resistance; bonds well; usually two-part system with slow cure times; may yellow with UV exposure.
  • Urethanes: Resilient coating often used for pedestrian traffic surface; fast cure time; moisture sensitive; may be used top of an epoxy for additional protection.
  • Polyaspartics: High performing coating that is expensive and difficult to apply because of two-part system with short pot-life; UV stable; only 1 coat needed.

This table provides some commercial examples:

Brand name Manufacturer Composition Comments Application Cure-time Longevity Links
Armor AR350 Foundation Armor solvent based acrylic Interior or exterior use; Wet look; non-yellowing, UV resistant Two coats recommended; Use roller or sprayer; self-priming recoat in 2-5 years Website
Clear-Seal Acrylic Urethane Rainguard acrylic urethane (single component self-cross-linking) Interior or exterior use; resistant to solvents, oil, gasoline and UV; low VOC (<50 g/L); water-based; low gloss Recommends first coat of water-repellent on porous surfaces; Use brush, t-bar or pump sprayer; clean up with water 60 min recoat/ 24 hours to walk-on 5 year warranty Website, SDS
Decra-Seal Natural W.R.Meadows water-based sealant Interior or exterior use; can add stain, dyes or aggregate for decorative effects; Low VOC (<50 g/L); Water-repellant; matte finish Industrial sprayer recommended; shelf life = 1 year; clean-up with soap and water dries quickly; restrict walk-on for 12 hours, vehicle traffic for 24 Website, Chart, SDS
Floortex Polyaspartic Garage Floor Coating Floortex polyaspartic Interior or exterior use; low VOC; easy to maintain, minimizes dust and dirt; Expensive; Use roller or squeegee (don't make errors because it dries quickly) 1 hour to dry
Epoxyshield Basement Floor coating kit Rust-oleum epoxy Formulated for indoor use 16 hours to dry Website =


PS 101 Siliconate Multi-surface sealer lithium-silicate densifier with silconate stain repellant Interior or exterior use; ; water repellant, stain-proof
Industrial-Seal 117A V-Seal lithium-silicate densifier with silconate stain repellant Interior or exterior use; no VOC ; waterproof, controls dust, allows deep penetration to chemically harden and fortify the substrate Water-based material; Use roller of low-pressure sprayer; Use only 1 coat; shelf life = 1 year; clean-up with soap and water Dry to touch in 1-3 hours; allow 12-24 hours Website
RadonSeal RadonSeal lithium-silicate densifier with silconate stain repellant
Consolideck lithium-silicate densifier with silconate stain repellant

Synonyms and Related Terms

concrete floor sealant

Physical and Chemical Properties

Resources and Citations

* CorrosionPedia: Concrete Floor Coatings]