79 Wood Block Mastic

    79 Wood Block Mastic

    Available in: 5 gallon pails

    KARNAK 79 Wood Block Mastic is prepared from carefully selected asphalts, solvents and mineral fillers. These components are mechanically mixed  thoroughly and passed through a high speed homogenizer ensuring a smooth, trowel consistency product free from foreign matter and lumps.




    • VOC: 261 g/L

    Coverage Calculator

    • 2-2.5 Gallons per 100sf**


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


    KARNAK 79 Wood Block Mastic is a highly adhesive asphalt cement expressly designed for mastic use in cold application of wood block flooring.

    Preparation & Application

    The temperature of KARNAK 79 Wood Block Mastic when applied should be above 70F. If necessary, KARNAK 79 Wood Block Mastic may be warmed by storing containers in a heated room prior to application. Concrete floors must be dry, sound, level, clean and at least 30 days old, with a good wood float  finish or equal. Grease, oil stains and dust must be removed, and high spots levelled. Low areas should be filled with concrete patching mix. Let dry  thoroughly after cleaning or patching. Dusty or very porous surfaces should be primed with KARNAK 108 Asphalt Primer at the rate of 1/2 to 1 gallon per  100 sq. ft. KARNAK 108 Asphalt Primer must be fully cured, (dry to the touch), before application of KARNAK 79 Wood Block Mastic.
    KARNAK 79 Wood Block Mastic should be applied directly from the container. Spread at the rate of 1 gallon per 40 to 50 sq. ft. using a 1/16 inch serrated  mastic trowel with a sawtooth pattern. Apply the KARNAK 79 Wood Block Mastic only at recommended rates of coverage. An inadequate amount will result  in poor bonding, while an excessive amount may cause bleeding of the mastic between the blocks. KARNAK 79 Wood Block Mastic must be allowed to dry a  minimum of at least 2 to 3 hours or until the surface is dry to the touch. Installation of the wood blocks to the KARNAK 79 Wood Block Mastic may be safely delayed up to 24 hours if desired. Drying is hastened if adequate ventilation is provided. Do not apply blocks to wet or excessive KARNAK 79 Wood Block  Mastic. Application instructions of the wood block manufacturer take precedence and should be followed in close detail to ensure a satisfactory application.

    Caution/Care of Tools

    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 use. Do not thin. Dispose of in an environmentally safe manner.

    Tools and other equipment should be thoroughly cleaned with mineral spirits, taking necessary precautions when handling combustible materials.