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SpecHard – Intraseal

Water-based siliconate sealer/densifier

SpecHard-Intraseal is a water-based silicate/siliconate sealer/densifier that significantly enhances the durability and appearance of concrete floors exposed to pedestrian and vehicle traffic. This proprietary, colorless blend of silicates and siliconates effectively penetrates concrete surfaces to seal, densify, and harden them, extending their lifespan and reducing maintenance costs. It is environmentally friendly, VOC compliant, and odorless, making it a safe choice for various applications. SpecHard-Intraseal is designed to resist dusting for years, offering a low sheen that beautifies the concrete surface without altering its non-slip texture.

  • Reduces concrete surface porosity and increases hardness.
  • VOC compliant, non-yellowing, and resists stains and chemical penetrations.
  • Minimizes and simplifies the removal of tire marks.
  • Water-cleanable equipment.
  • Suitable for fresh, new, or existing concrete.
  • Enhances appearance with a low sheen finish.
  • Compatible with SpecChem SpecTilt bond breakers for tilt-up projects.
  • Offers sealing, curing, hardening, dustproofing, and efflorescence prevention.
  • Promotes bonding of secondary toppings and controls hairline cracks.
  • Economical with a one-time application and water cleanup.
  • Complies with CDPH Standard Method V1.2 and all LEED V.4 requirements.
  • USDA accepted for various concrete floor classes and super flat floors.

Tech Sheet
Safety Sheet
Sell Sheet
Spanish Tech Sheet


  • Coverage varies based on the finish and porosity of the concrete.
  • Recommended application temperature above 40°F (4°C) and rising.
  • Ensure the concrete surface is clean and dry for optimal penetration.
  • Apply using spray, squeegee, or broom based on concrete porosity, scrubbing with mechanical scrubbers for best results.
  • Keep the surface saturated with SpecHard-Intraseal for 20-30 minutes, applying a light water spray to enhance penetration.
  • For fresh concrete, apply after final troweling and bleeding to achieve optimum penetration.


Available in 55-gallon drums and 5-gallon pails.

Shelf Life

Shelf life is 2 years if properly stored. Do not freeze.