160512-karnak-170

    298 Alumin-R

    298 Alumin-R

    Available in: 5 gallon pails and 55 gallon drums

    KARNAK #298 Alumin-R can be applied by brush, roller or spray. If spray equipment is utilized, use a standard heavy duty spray pump. Equipment manufacturer should be consulted for more complete information.

     

    Advantages

    1. Easy to apply.
    2. 24 hour cure.
    3. Tough, flexible elastic, rubber-like film.
    4. Excellent adhesion over clean asphalt surfaces.
    5. Excellent water and water vapor resistance.
    6. Excellent weather resistance.
    7. Good resistance to salts and alkalies.
    8. Aluminum reflectant characteristics.

    Specifications

    Cool Roof Rating Council (CRRC)
    Solar Reflectance:
    Initial 0.68 3 year 0.61
    Thermal Emittance:
    Initial 0.40 3 year 0.45
    SRI:
    Initial 69 3 year 59

    Coverage Calculator

    • 1.5-2 Gallons per 100sf**

     

    This is intended as a general guideline only, coverage can vary based on many factors.

    Uses

    KARNAK #298 Alumin-R is recommended as a coating for use on modified bitumen membranes, BUR, concrete tile, metal and mobile home roofs.

    Physical Properties

    Weight per Gallon: 8.5 lbs.
    Solids by Weight: 47%
    Color: Silver
    Permeability: 0.15 mg.per sq. cm.
    Cure Time: 24 to 48 hrs.
    Performance Temp.Range: -40°F to 180°F
    Application Temperature: 40°F and Rising
    Elongation: 300% D-412
    Tensile Strength: 300% D-412

    Preparation & Application

    SURFACE PREPARATION:
    All surfaces to be coated with KARNAK #298 Alumin-R must be clean, dry, free from oil, grease, and loose debris. New BUR asphalt roofs should be allowed to weather 90-180 days before coating. Modified bitumen membranes should be coated immediately after the membrane has been laid into place. Metal  roofs should be cleaned with a power washer using a minimum of 3000-3500 psi to remove rust and loose flaking prior to the application of KARNAK #298  Alumin-R. New metal should be allowed to weather 30 days before coating. KARNAK #298 Alumin-R should be mechanically mixed for several minutes before application. Badly weathered or alligatored asphalt surfaces should be primed with KARNAK 100 Non-Fibered Emulsion or 220 Fibered Emulsion prior to coating with 298 Alumin-R. Allow emulsion primer to cure a minimum of 3-5 days before application of aluminum coating.

    APPLICATION:
    KARNAK #298 Alumin-R can be applied by brush, roller or spray. If spray equipment is utilized, use a standard heavy duty spray pump. Equipment manufacturer should be consulted for more complete information.

    Note: Coating Modified Bitumen Membranes with Aluminum Coatings:
    KARNAK recommends coating torch-applied modified bitumen membranes as soon as possible after the membrane is installed. KARNAK ‘s experience, laboratory and field tests, as well as NRCA, RCMA and ARMA reports, indicate that aluminum coating will reduce the combined effects of ultraviolet rays, heat and moisture, which, especially on APP modified bitumens, enhance exudation that can cause discoloring and delamination of any surface coating. After 60 days, recommended application temperatures are 40° Fahrenheit and rising. Must not come in contact with any type of moisture within 24-48  hours after application.

    COLD-PROCESS SYSTEMS AND COATINGS, EITHER EMULSION OR SOLVENT BASED, SHOULD ONLY BE INSTALLED ON DECKS WITH POSITIVE DRAINAGE. PER NRCA, (NATIONAL ROOFING CONTRACTORS ASSOCIATION) “THE CRITERIA FOR JUDGING PROPER SLOPE FOR DRAINAGE IS THAT THERE BE NO EVIDENCE OF STANDING WATER ON THE DECK 48 HOURS AFTER IT STOPS RAINING.”

    When installed properly, this product will help reduce energy costs. Actual savings will vary based on geographical location and individual building characteristics. Consult your product manufacturer, roofing contractor, or call 1-888-STAR-YES (1-888-782-7937) for more information.

    Caution/Care of Tools

    CAUTION:
    Do not use near open flame. Avoid breathing solvent fumes and prolonged contact with skin. Do not take internally. If swallowed, do not induce vomiting. Call a physician immediately. Keep out of reach of children. Keep container covered when not in use. Do not thin. Dispose of in an environmentally safe manner.  Cover air intakes during application and while drying.

    CARE OF TOOLS:
    Tools may be cleaned with mineral spirits or similar solvent.

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