Blok-Lok™ Siloxane Water Repellent

Brand: Blok-Lok


What It Is: Invisible moisture protection for vertical surfaces
Surface Types: Concrete, Wood, Masonry, EIFS (see TDS for full list)
Formulation: A Water-based Siloxane
Coverage Rate: Approx. 40-200 sq. ft. / gallon (See TDS for details)

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Blok-Lok™ Siloxane Water Repellent

is a water-based, siloxane repellent composed of high-quality chemicals. The blend creates a clear, deep penetrating, non-film forming, and chemically reactive masonry water repellent that contains no silicone oils, paraffin wax, or urethanes. Blok-Lok™ is eligible for a material warranty of up to 5 years.

Protects Surfaces from Damage Caused by Moisture

Protect your project from water intrusion, preventing efflorescence, lime, spalling, freeze/thaw damage, stains, mold, and mildew.

Natural Finish

Preserve the look of the project with 100% breathable and invisible protection that will not yellow over time.

Safe to Use

Apply anywhere in North America because it contains 20 g/L V.O.C.’s, no carcinogens, very low odor, and can be applied on interior and exterior surfaces.

Easy to Apply

Spray on easily in a flood coat using an airless sprayer.

What is Micro-Lok™?

Blok-Lok™ is formulated with a proprietary ingredient called Micro-Lok™. It creates a micro-molecular chemical and mechanical bond between the water-repellent chemicals and the substrate.

Why choose a concentrate?

The Benefits of Specifying Concentrates:

  • Reduces carbon footprint
  • Reduces job site and landfill waste
  • Reduces worker and supply chain fatigue

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  • Prep Surface Using Restore-N-Prep
  • Typically dries in an hour or less
  • Easily apply with an airless sprayer