300014 Brushable Chimney Crown Repair – Elastomeric & Waterproof Coating for Crowns & Masonry - Fast-Setting & Long-Lasting Protection Crack & Leak Prevention - 1 Gallon

Covered very nice easy to install

I rebuilt / resurfaced my crown last fall and went up to check on it now on a nice day in winter. It’s solid, looks beautiful and very confident it’s a job well done, and money well saved over getting a pro to sap my savings. It is truly a game changer, my crown is 75 years old, so I resurfaced the whole thing plus added a good 1/2 inch to the top, and it looks like new, will serve out the remainder my life no doubt. It’s really satisfying knowing a job is done ‘forever’, so thanks for engineering a great product.

I was very skeptical about doing this, however, I am very pleased now 2 years later at how much it has held up. I followed the directions to a T and prepped the service, cleaned it, roughed it up and then applied very very thick. I used the entire tub on the chimney. I am very pleased at the results as you can see from my before, after, and 2 years later photos. I posted photos of 2022(before application, lots of large cracks), 2022 (During application w/blue tape still on edges) and 2024 (2 years later, the rusting is from my rusting cap, which I need to remove, brush and repaint). I am just a homeowner that was impressed with a product that just worked, I have done so many projects that don’t work out. For now my cracks are still sealed and I can avoid having to put new concrete cap, this is firm but malleable and does the trick.

I didn't have to stir it once I opened it. It was premixed to stirring or mixing. I did open it before I went up 40ft in the air so I didn't struggle with trying to cut the manufacturing seal off the container at heights. It's a safety thing for me. Pictures later date

My chimney crown developed cracks that allowed moisture to saturate the bricks over the fireplace. The latest professional fix was annoying and expensive, so I bought this stuff and my son got up there and did the job this time. So far so good. In the past when I was able I'd gotten on the roof myself and filled the obvious cracks, but wasn't using the proper product and years later it had hardened and wasn't filling the cracks properly anymore. I called a professional. He did a good job that lasted 8 years, but at an outlandish price so I wasn't eager to call him again. The highly rated firm I called instead offered a better price (still $300), but had scheduling issues that dragged the effort out so long my ceiling got wet too and was in danger of falling in. Their first fix improved the problem but didn't fix it entirely so they had to come back and after 3 years the problem reappeared. After the bad experiences I was more interested in seeing if we couldn't do a better job ourselves. This product is very thick and grainy. It's cement colored so works well on the chimney crown. It doesn't drip so it's easy to control application. We used an inexpensive brush and just threw it out afterward to avoid messy cleanup. If such a product was used by the second professional, it was obvious it had been thinned which probably accounted for the short correction time. My son spent about 20 minutes applying this product which he said was easy, and after recent heavy rains, we can see the leaking has stopped. There is still more product in the container so I'll tape it closed to preserve it in case we need to use it again in the future. I'm very pleased with this product. It seems expensive, but is more than enough for a thick application on a large chimney cap and does the job. The directions say the chimney cap must be dry and it must be at least 45 degrees F (but not greater than 90) and remain so while the product cures (2-4 hours). We had to choose a good weather period when it wasn't too cold here, but that is far easier if you're doing the job yourself than waiting for a service appointment only to have it wet or cold that day so rescheduling is required.

It wasn't as easy to spread as I'd hope, but that could have been my fault given I was half-way through coating the crown and thought I was going to run out (I only bought 1 gallon tub). So I might have started skimping on product I put onto the crown until the crown had at least a coating ... then went back over it with another coat once I was sure everything at least had someone of a seal. Turns out, 1 gallon was plenty for my large crown of 50 years. It took longer to cure than expected ... I came back the next day and the "goop" you brush on was "squishy" (but not wet or got on my fingers). Now, a couple weeks later, the crown repair material is solid (not squishy any more). I'm keeping an eye on the firebox to see if anymore leakage is occurring, and I am THRILLED to say that we've been raining for days and the firebox inside the house is still dry. I call this a success.

Pleasantly surprised with how easy this was to apply and how well it worked. Can't get easier than this. Happy with the end result

First cleaned the crown with a nylon bristle brush. Then used compressed air to remove the dust. Used caulk around the edges and around the terracotta clay. Spritz with water then work in the first coat. Label says to apply a heavier second coat after several minutes. I waited at least an hour before applying the second coat. Looks great. We'll see how long it stays this way. Before and after photos.