19 Ultra Rubberized Asphalt Caulk (wet/dry)

19 Ultra Rubberized Asphalt Caulk (wet/dry)

Available in: 10.1 oz. cartridges; also available in 1 gallon, 3 gallon & 5 gallon pails

KARNAK 19 Ultra Caulk is the next generation asbestos-free rubberized asphalt caulking cement. Scientifically compounded with a selection of rubber reinforced asphalt, mineral fibers, and refined solvents, KARNAK 19 Ultra Caulk is manufactured to a thick yet pliable consistency for ease of application by caulk gun. KARNAK 19 Ultra Caulk provides a durable elastomeric sealant of greater strength, excellent adhesion and high resistance to water and weathering.

KARNAK 19 Ultra Caulk is composed of special chemical ingredients which give it a unique water displacement quality (Wet/Dry). KARNAK 19 Ultra Caulk dries to a tough, flexible, waterproof and corrosion proof rubberized sealant which gives maximum protection and excellent performance over wide ranges of temperature and weather conditions.



  • • Ideal as a shingle tab adhesive
    • Sticks under water the first time
    • Rubberized – elastomeric
    • Wet or dry application
    • Improved low-temperature flexibility
    • Improved water and weather resistance
    • Will not shrink or crack
    • Smooth, easy to apply
    • Excellent adhesion
    • Excellent resistance to flow (sag) at high roof temperatures
    • Ready to apply
    • Greater strength
    • Asbestos-Free
    • VOC: 306 g/L



KARNAK 19 Ultra Caulk is a general purpose asbestos-free flashing cement caulk for repairing leaks in shingles, concrete, metal or asphalt roofs, flashings on walls, chimneys, flues, skylight flashings, downspouts and cornices. KARNAK 19 Ultra Caulk is excellent for sealing cracks in concrete and brick, as a joint filler for precast roof slabs, for repair, patch and flashing detail on SBS and APP modified membranes and for general purpose use in maintenance of exposed buildings and structures.

Physical Properties

Consistency: A smooth rubber-like caulk consistency which will readily spread on and adhere to vertical and horizontal surfaces without sagging.
Character of Dried Film: Excellent adhesion to masonry, steel, cured concrete, shingles, asphalt roofing, skylight flashings and a variety of other surfaces.
Film Performance.

Characteristics: The dried film retains its elasticity and ductility so that the material will resist extreme variations in temperature
and weather.

Sag Resistance: Excellent resistance to flow at high roof temperatures on vertical surfaces.
Homogenized: Thoroughly mixed and consistent throughout.
Consistency: 19 Ultra caulk is always smooth and free of lumps.

Preparation & Application

Although it can be applied underwater for emergencies, it is best if all surfaces are clean, dry and free from oil, grease, dust, dirt, loose paint or foreign matter.

Spread KARNAK 19 Ultra Caulk to an average thickness not to exceed 1/4” and work or press tightly into joints, seams or cracks using a caulking tool. Application rate of a 1/4” x 1/4” head of caulk will yield approximately 25 lin. ft. per 10 oz. caulking cartridge. Coverage rate may vary depending on desired thickness and surface being caulked.

Caution/Care of Tools

Combustible Mixture: 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 physical immediately. Keep out of reach of children. Keep container covered when not in use. Do not thin. Consult SDS for further safety precautions. Dispose of in an environmentally safe manner. Cover air intakes during application and while drying.

Tools and other equipment should be thoroughly cleaned with mineral spirits, taking necessary precautions when handling combustible materials. To clean hands use 709 Karnak Karna-Klean or a waterless hand cleaner.

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