Model # HE204142

Internet #100080447

Store SKU #567124

Henry 0.90-Gal. 204 Plastic Roof Cement


0.90-Gal. 204 Plastic Roof Cement

Frequently Bought Together

Product Overview

The Henry 204 1-Gal. Roof Cement is a high-quality, asphalt-based waterproofing and leak-stopping cement for roofs, shingles and flashing. It makes a long-lasting bond and is a good choice for application on dry surfaces when it is not raining. It has a heavy body and won't sag, making it ideal for vertical and flat surfaces alike.

California residents: see   Proposition 65 information

  • Seals leaks around chimneys, skylights, vents and gutters as well as repairs shingles, roofing, flashing, splits, cracks and raised edges
  • Formulated for application under dry conditions only, waterproof when cured
  • Asphalt-based no-sag formula won't drip in vertical applications
  • Apply with roofing trowel, putty knife or caulk gun
  • Covers up to 12-1/2 sq. ft. per Gal.
  • Coverage: Approximately 12-1/2 sq. ft. per 1-Gal. pail (1/8 in. thick)

Info & Guides

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Warranty / Certifications

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Customer Questions & Answers

can this be used over the old 204?

can this be used over the old 204?
Asked by: tak
Yes, you can. You will want to remove whatever old and loose product you can and follow the prep instructions on the label. If you want something a little more flexible that will last longer, then I recommend using one of our Rubberized Roof Cements. Our Henry 209XR Extreme Rubberized Wet Patch has the most rubber with UV inhibitors so it won't crack and offers a Lifetime year warranty; Our Henry 208R has the next most rubber and offers a 10 year warranty; and finally our Henry 208 Wet Patch is rubberized and offers a 7 year warranty. For more info, check out or contact our product support at 800-486-1278. Thanks for putting your trust in the Henry Company and Home Depot.
Answered by: Henry Company
Date published: 2017-03-10

Anyway to thin this to use easier?

I am using on a plant box that is wood, its so thick I can barely get it on. Anyway to thin this out?
Asked by: George80
Heat makes it more workable. Leave it out in the sun for a while or place it near a heat source, but not open flame since its flammable.
Answered by: GR
Date published: 2017-02-20
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Customer Reviews

0.90-Gal. 204 Plastic Roof Cement is rated 4.8 out of 5 by 4.
Rated 4 out of 5 by from It used to be so much better The old 204 was so much better. This new stuff is runny and it cracks once it dries, the old 204 wouldn't crack even after years of being exposed to the sun. Still it is much better than the other brands. Make sure you buy a pair of gloves with it because it will get all over the place, and its very hard to remove from your hand.
Date published: 2015-10-10
Rated 5 out of 5 by from Good coverage Easy to apply and has good coverage. It does what it is suppose to do.
Date published: 2016-01-04
Rated 5 out of 5 by from excellent used through out the project and was satisfied with it.
Date published: 2013-07-23
Rated 5 out of 5 by from This is a good product to use and fix little minor cracks.
Date published: 2010-09-09
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