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Customer Reviews for Karnak 1-Gal. 19 Flashing Roof Cement

Internet #100278428

Model #19-1

Store SKU #600366

  • Asphalt-based formulation makes roof surfaces leakproof
  • Ideal for repairing shingles, concrete, wall flashings, and more
  • Seals cracks on vertical and horizontal surfaces without any sags

Customer Reviews

  • 4.7
    out of 159 reviews
  • 94% recommend this product
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Showing 1-30 of 159 reviews
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Best product out there to seal chimney lead flashing....
Best product out there to seal chimney lead flashing.
by
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1 found this review helpful
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Easy to apply and very effective....
Easy to apply and very effective.
by
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Easy to use.
Easy to use.
by
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  • Recommended
Rating provided by a verified purchaser...
Rating provided by a verified purchaser
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Great product will buy again....
Great product will buy again.
by
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Got the job done for a minor roof repair...
Got the job done for a minor roof repair
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5 Star Review
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Use with Karnak asphalt membrane for a better repair...
Use with Karnak asphalt membrane for a better repair
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5 Star Review
Rating provided by a verified purchaser
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Used it to seal the flashing around my chimney. ...
Used it to seal the flashing around my chimney. Easy to apply, but you do need to use a spackle knife or similar to do so. I suggest you don't do it while the sun is brightly shining on the area you are sealing. A cloudy (not rainy) day may be best or when sun is not directly hitting the area.
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The product failed to cure after 48 hours resulting in a meltdown and flowing through the buildin...
The product failed to cure after 48 hours resulting in a meltdown and flowing through the building then finally finding a resting spot in an air conditioner unit. There were no instructions on curing time on the can so I had to you tube it and still not much help.
by
Response from KARNAK Technical GroupAug 19, 2019
KARNAK 19 Flashing Cement or KARNAK 19 Ultra Rubberized Flashing Cement begins to skin-over after application. Depending on the outside temperature and the thickness of the application, full curing(Drying) can take from a few weeks to months.
Based on your email, where and how was the material applied? Photos would be helpful as well.
You can contact me at KARNAK at mgada@karnakcorp.com or phone: 8005-527-6251. KARNAK
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3 Star Review
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5 Star Review
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5 Star Review
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It does the job. ...
It does the job.
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5 Star Review
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Great product for Sealing
Great product for Sealing
by
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  • Recommended
Wallet killer
Emptyed my wallet. Works for now. Not a long term sealer. Cracks under uv light
by
Response from KARNAK Technical GroupMay 3, 2019
Sorry to hear you have not experienced the results you anticipated. A few things to check would be to make sure the substrate is securely attached, the surface is clean and free of loose sealants and coating and that fabric reinforcement was used with the flashing cement. KARNAK
    • Recommended
    5 Star Review
    Rating provided by a verified purchaser
    by
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    Did exactly what we needed.
    Did exactly what we needed.
    by
    • DIY
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    • Recommended
    Works great
    Works great
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    • Recommended
    5 Star Review
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    5 Star Review
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    leak stopped...
    leak stopped
    by
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    Easy to apply works as expected. ...
    Easy to apply works as expected.
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    Showing 1-30 of 159 reviews

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