Easy Crown Repair with Chimney RX – DIY

One of the items during the initial inspection was a repair to the Chimney Cap Flue and Crown. The crown was in need of resurfacing and the two flue caps had holes in them from years of service. Like many of my projects, if I can spend just a little more to get the next level of quality that is my primary objective. Something a little nicer.

Chimney RX Brushable Crown Repair is an excellent product. It would have gotten 5 stars but it took a little longer to setup than what was in the instructions. However it seems like it has / is working well over a year later.
Old rusted and failing chimney caps made of steal and a cracked crown.
As you can see, the Flue Cap and Crown need a little help.

My oldest daughter was brave enough to help out on this project. She has never been on the roof but we figured out she was not afraid of heights. So up to the roof we went. As you can see below the crown was really in need of repair. Don’t forget you will need a pair of pliers or channel locks to remove the old caps!

Chimney Crown needing repair

I purchased a tool and the crown repair paint. It is very thick paint that seems to be half cement and half latex paint. The brand is Chimney RX – Brush-able Crown Repair. An EXCELLENT product.

Chimney RX - Brushable Crown Repair, BBQ brush, Paint brush
Repairing your Crown is as easy as two simple steps… clean with a BBQ brush and then paint.

Here is Chimney Rx’s Instruction Video

Steps to prep and repair your chimney crown

A quick note on repairing your Chimney Crown with Chimney RX. They don’t recommend using the product to repair deep cracks. If you need to repair the concrete then you will need in addition to buy some concrete repair.

Total Time: 45 minutes

  1. Remove Old Chimney Caps.

    Remove (if you have them) the old chimney caps. If you will discard them and not reuse just chuck them down to the ground to get them out of the way.

  2. Brush Surface

    Get a BBQ Brush with a scraping head. You can find these at the dollar store or here on Amazon. Now take out the BBQ brush and start to brush the crown from end to end.

  3. Remove Loose Concrete

    Use the scraper to remove old semi loose concrete and in my case the old paint.

  4. Blow off Surface

    Blow off the remaining dust and dirt once you have ran the scraper.

  5. Paint Brush

    Get a decent paint brush. It does not need to be a fancy high end brush but something that is clean and has good bristles. I went for a 2.5 inch wide brush for the Chimney RX and it worked fine

  6. Apply Chimney RX

    Open the container of Chimney RX – Brushable Crown Repair. find a central spot and slowly pour the paint onto the crown. Start with a little and work the paint into the crown. Keep in mind it is very thick but goes on easily. Use long even strokes and it will look like new concrete when done! Make sure to pay attention to the ends so you don’t paint the side of the chimney.

  7. Drying and Curing

    Now let it dry thoroughly. It says cure time is roughly 4-6 hours but I needed to let it sit for a little more than a day.

Chimney RX - Brushable Crown Repair installed
Chimney RX – Brush-able Crown Repair

Once done, you will be very happy with the results. I know I am.. total time (outside of drying time) was roughly 4.5 hours mainly due to the crown not being 100% dry. Also a second coat in a couple of spots would not be a bad idea. This product seems like it will hold up well, and it was relatively simple process. It will keep your crown looking great for years to come.


Thanks for stopping by. Joe and Mel appreciate you going along on this journey with us and we hope you enjoyed this post. If you want to get in touch with us, leave a comment below or use the contact us form. We are always looking for feedback, ideas and your questions on our projects.

Until next time!

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