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

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.

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’ve used this product before with excellent results and ordered more for my second home two chimneys which I just applied . Easy application ., excellent durability ., waterproofing .

Product was very user friendly to apply compared to others I have used. Using tape for a clean straight edge per Mfr. recommendation was great advice, since because of thickness, trying to paint a clean straight line as with house paint is just inefficient time management. The initial bonding coat dried much quicker than I anticipated before need to apply the 2nd coat per Mfr literature, so if a sunny day, be careful to time management between coats...not rocket science....but worth this word of caution. The only reason I am giving it 4 stars is compared to another product I use( Sashco 'Through the Roof'), this was really not that sticky at wet application. In fairness, many water based products appear to have a weak bond until full cure, and only time will prove it's performance. The other product that I use is much stickier and even bonds to wet surfaces, but it is clear and not breathable, so I chose to use this product because of its attributes. I will follow up in 1 yearwith feedback on durability, especially the bond seam where the top chimney cap abutts the flu. Appearance is of new concrete when finished. On the assumption it performs as desired....this product is a definite winner.

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.

****UPDATE***** It’s been a18 months and no peeling, cracking, or bubbling! Keep in mind when using this product you should use a hard steel brush to remove all debris and make sure the surface area is DRY. The product cannot adhere to a moist surface and needs a minimum of 48 to 72 hours to cure and dry completely, less time If the weather is warm. This is a user friendly product.Wow- housewife? mother? single mother? business woman? daughter? I have a product for you!! Does your chimney need work? If your not afraid to get on your roof this is the best product DIY for you! Dust off the debris on the crown of your chimney, use a bottle of water to spray down the old cement crown, and apply this Brushable Chimney Repair right on.... I recommend using disposable gloves and bringing a small cardboard box or trash bag with you to wipe off and throw away any mess. Believe me though, this is the perfect consistency and it literally feels just icing a cake! I purchased a medium hard brush, and a 5.00 masonry tool to apply it, it started curing overnight. and as you can see it looks beautiful!!!