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    407 EPDM & SPF (EPDM and SPF Base Coat)

    407 EPDM & SPF (EPDM and SPF Base Coat)

    Available in: 5 gallon pail & 55 gallon drums

    KARNAK 407 EPDM & SPF is a 100% acrylic elastomeric co-polymer emulsion, specifically designed as a base coating for adhesion to EPDM and SPF (Spray polyurethane foam) roofing membranes and systems. When applied to a suitably cleaned EPDM or SPF roofs and top coated with a durable KARNAK acrylic elastomeric finish coat such as 535 QS Enviro-Lastic, 501 Elasto-Brite or 529 Renu-White, the coatings can extend the life of the existing roof membrane.The technology used  in KARNAK  407 EPDM & SPF enables the coating to have very good adhesion and resistance to blistering when applied to EPDM or  SPF roofing systems.

     

    Coverage Calculator

    • 1.5-1.5 Gallons per 100sf**
    • 16 mils per gallon per 100 sq ft. (Brush Trowel Grade)
    • 0.25" x 0.25" = 75' per 30 oz. Cartridge (Caulking Tube)

     

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

    Uses

    KARNAK 407 EPDM & SPF is intended for use as an elastomeric base coat for application over properly prepared and clean EPDM and SPF roofing membranes and  systems prior to the application of 535 QS Enviro-Lastic, 501 Elasto-Brite or 529 Renu-White finish coats. All surfaces must be properly cleaned, dry and leak free before coating. Suitable for horizontal and vertical applications.

    Physical Properties

    Weight Per Gallon: 11.3 lbs.
    Solids By Weight: 62%
    Solids by Volume: 50%
    Color: Light Pink
    Performance Temp. Range: -15ºF to 180ºF
    VOC Content:

    Preparation & Application

    SURFACE PREPARATION:
    Surfaces to be coated should be dry, clean and free of dirt, dust, rust, grease, oil and loose coating. Power wash EPDM surfaces using 507 SPC Primer Wash and water and SPF surfaces with 799 Wash-N-Prep Roof Cleaner and water. Wash roof surfaces with a minimum of 2000 psi. taking all necessary  precautions to avoid damage to the roof system. Patch and repair all cracks, leaks and damaged areas with appropriate sealants or caulking materials. All wet insulation and foam and/or exposed foam should be removed and replaced with like materials. 407 EPDM & SPF base coat must be dry prior to  application of additional coatings.

    APPLICATION:
    Mix lightly prior to application of the coating. 407 EPDM & SPF may be applied by brush, spray equipment or roller.

    BRUSH / ROLLER APPLICATION:
    Brush / roller application should be done applying the coating in the same direction. Apply the finish coat perpendicular to the base coat.

    SPRAY APPLICATION:
    Utilize a standard paint spray pump or airless spray pump. Equipment manufacturer should be consulted for more complete information. Spray application should be done with a 50% over-spray pattern.

    COVERAGE RATE:
    Apply 407 EPDM & SPF over the surface at the rate of 1.5 gallons per 100 sq. ft. Allow 407 EPDM & SPF to dry 8-24 hours before applying selected finish coating. The total dry mil thickness of 407 EPDM & SPF and finish coating should be 20 to 24 mils. Coverage will vary depending on the surface to be coated.

    Caution/Care of Tools

    CAUTION:
    Do not apply when rain is imminent. Coating must be dried before exposure to water. Store in a heated room and keep container covered when not in use. Do not thin. Keep out of reach of children. Avoid prolonged contact with skin. Dispose of in an environmentally safe manner. Cover air intakes during application and while drying.

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

    CARE OF TOOLS:
    While material is still wet, tools may be cleaned with water. Dry coating can be cleaned with Karna-Klean or xylene or similar solvent, taking the necessary precautions when handling flammable materials.

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