I have a walk out terrace. I applied Waterproofer Elastomeric Roof Sealant (Henry). It looks great and its reflective. However, after 3 weeks its still sticky. Is it supposed to be sticky for that long?

The product is: #HE289146 (https://www.homedepot.com/p/Henry-0-90-Gal-289-Elastocaulk-Acrylic-Roof-Sealant-HE289146/100051524)

  • Henry makes a few different elastomeric roof coatings - could you identify exactly which one you have? Either the full name or the 3-digit number like 287, 587 or whatever it is, or just add a pic of the bucket.
    – brhans
    Commented Oct 20, 2021 at 10:16
  • Added more information. Sorry about that. Commented Oct 20, 2021 at 14:08

1 Answer 1


Reading through the manufacturer's product description & datasheet it appears that they intend for this product to have another coating applied on top - it's not intended as the only or final coating.

The product description reads:

... specially formulated for repairing and preventing roof leaks prior to coating with an acrylic reflective coating

and the datasheet has:

... and allow to set up before coating

So my interpretation of the problem is that you're supposed to coat this with something else to end up with a final (non-sticky) finish.

  • Thanks for that. I was beginning to worry. What would the final product be? Commented Oct 20, 2021 at 15:39
  • 2
    As noted in the quote above, @NinjaGaiden, "an acrylic reflective coating". I'm sure Henry's web site will list several options that will work well with the product you've purchased.
    – FreeMan
    Commented Oct 20, 2021 at 17:02

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