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  • Micro-Seal Silane Siloxane Water Repellent

    Penetrating Silane/Siloxane Technology
    Ensures your project is protected from water intrusion and helps prevent efflorescence, lime, spalling, freeze/thaw damage, stains, mold, mildew, and UV damage.

    Natural Finish
    Preserves the look of the surface with a clear, natural finish and does not darken or add gloss to the surface.

    Safe to Use
    Can be applied anywhere in North America because it contains zero VOC’s, no carcinogens, no odor and can be applied on interior or exterior, vertical or horizontal surfaces.

    Easy to Apply
    Quickly apply with an airless sprayer in a flood coat (See TDS below for details).

    Excellent Warranty
    Protects surfaces up to 10 years.

    Micro-Seal Silane Siloxane Water Repellent

    Protect, restore and extend the life of your project with Micro-Seal® Clear Finish Silane / Siloxane Waterproof Coating. It is a clear penetrating water repellent that is non-yellowing, low odor, zero VOC, and non-toxic. Formulated to not be affected by weathering, salt, dirt, freezing temperatures, UV light, and wind-driven rain, among many other damaging elements. Micro-Seal dries down to a clear, natural finish that does not change the surface texture or color. Ideal for use on uncoated/unpainted, vertical/horizontal, interior/exterior surfaces such as: concrete, brick, pavers, wood, porous natural and artificial stone, masonry, unglazed/unpainted porous tile, and color integrated or unpainted stucco.

    Note to Specifier – CSI Reference Codes
    04 2 00 Exterior Stone, Cladding, Stone Masonry
    07 19 00 Acrylic, Silane Siloxane, Penetrating Polyester, Hybrid Water Repellents
    09 24/25 Cement Plastering

    Best Tools for Application

    Small Surfaces
    A foam brush is recommended to soak in and saturate your substrate.

    Medium Surfaces
    Use a small hand pump sprayer.

    Large Surfaces
    Use an airless sprayer with a spray tip size between .035mm to .051mm.

    Application Best Practices

    1) Step One: Prepare the surface and confirm surface moisture is less than 25%. Remove dirt, grime, efflorescence, lime run, construction debris, form oils and release agents, chalked materials, loose and peeling paint, mold, mildew, etc. All cracks should be pointed or caulked.
    2) Step Two: Perform a test application to confirm fit and finish.
    3) Step Three: Apply the product according to It’s TDS.
    4) Step Four: Let cure.
    5) Step Five: Perform post application test to assure results are achieved.

    Benefits of Concentrates and How to Mix

    The benefits of specifying Concentrates:

    • Reduces carbon footprint
    • Reduces job site and landfill waste
    • Reduces worker and supply chain fatigue
    1. Refer to the description on the packaging for dilution ratios.
    2. Pour contents of concentrate into an empty container. The container size should be the size of the finished amount of product.
    3. Fill the container with clean water – we recommend distilled water for best results.
    4. Mix lightly with a stir stick.

    Specification and Ordering Options


    Substrate Uses and Anticipated Coverage Rates

    Substrate porosity varies due to type of substrate and/or the age of the surface and its exposure to weathering. As a result, coverage rates may also vary. In addition, in certain applications, two coats may be required. Please contact us for coverage estimates. Best practices are to first perform a test application on the substrate, followed by a rilem tube test to ensure adequate coverage/absorption.

    Refer to the product TDS for Surface Preparation and Application Methods.

    Need help? Call 1-888-765-7070 Option 2.

    Substrate Sq Ft / Gallon # of Coats
    Wood 150-200 1
    Concrete and Masonry Block 50-80 1-2
    Lightweight Block 40-55 1
    Adobe Block/Natural Stone 70-90 1-2
    Clay Brick 125-150 1
    Stucco 100-150 1
    Poured Vertical Concrete 125-150 1
    Poured Horizontal Concrete 300 1
    EIFS 80-120 1

    Other Applications

    Ideal for OEM Applications Concrete Curing
    Dust Proofing Grout Additive

    Mix with Water-Based Paint for Additional Water Repellency

    Testing Data and Product Characteristics

    Testing Data

    ASTM C666 2200 Cycles – No effect
    ASTM C672 100 Cycles No Mass Loss, No Scaling
    ASTM D2243 Do Not Freeze
    ASTM G154 2,500 Hours No Loss in Repellency
    ASTM C672/M 100 Cycles Treated Concrete, No Scaling
    ASTM E-514 98.7% Leak Red Water Pen Fed Spec
    SS-W-110C, ASTM C140 75% Min Required, 96.8% Leak Reduction
    ASTM D-1653 98.6% Effective
    ASTM C67 100% Vapor Permeable
    ASTM G 98.6% Effective
    ASTM E84 3,500 Hours- No Change
    NCHRP No. 244 95% Reduction, Series IV Salt Pounding
    87% Reduction, Series II Salt Pounding
    87% Reduction, Series II Chloride Ion Absorption

    Product Characteristics

    Silane/Siloxane Active Content 100%
    Reactive Solids 40%
    Volume Solids 4%
    Color of Material Milky White
    Odor Slight Odor
    V.O.C. 0 g/L V.O.C. Compliant in North America
    Flash Point Non-Flammable
    pH Value 6
    Viscosity 9.6 Seconds No. 4 Ford Cup
    Weight Approximately 8.7 lbs./Gal.
    Surface Dry/Recoat/Usable Approximately 1 Hour
    Coalescence Cure Time 5 to 7 days

    Approvals, Qualifications and Associations

    Call 1-888-765-7070 Option 2 for additional assistance.

    LAUSD – OESH Approved
    LEED Points Up to 3 Points
    LEED (New Construction) Available
    LEED (New Schools/CHPS) Available
    CARB Compliant
    SCAQMD Compliant
    All Other States and Canada Compliant
    FDA Meets Requirements
    USGBC Member
    APTA Member
    HPD Various Products Approved
    American Institute of Architecture Two Approved CE courses

    We’re Here to Help!

    Call 888-765-7070