Your cart is empty.
Your cart is empty.Product Description
Chimney Crown Sealer is a flexible, waterproof coating that is applied to the tops of chimney crowns to protect chimneys from water damage. This flexible membrane is easy to apply with a paint brush and will last for years. It repairs both mortar and concrete crowns. This durable, elastomeric coating can be used to repair minor cracks in chimney crowns to prevent chimney leaks. A half gallon container will cover approximately 20 square feet, (assuming 2 coats).
Long Lasting Performance
Long lasting protection for chimney crowns. Stays permanently flexible and won’t crack or chip.
Prevents Water Leaks
Water can come through cracks in your chimney and find it’s way into the interior of your home. This product seals cracks & waterproofs the top of your chimney.
Easy to Apply
Simply paint 2 coats of the product onto the chimney’s surface with a paint brush. Use duct tape to help create a clean edge.
Water Based
MasonryDefender Chimney Crown Sealer is a VOC Compliant Water-Based Sealer That’s Easy On the Environment & Easy to Clean Up
Coverage Rates & Dry Time
This product will cover approximately 20 sq. ft. per half gallon container (assuming 2 coats).
Dries to touch in 30 - 60 minutes. Product cures completely within 2 - 4 hours depending on temperature/humidity.
Finer
Reviewed in the United States on February 8, 2025
Used 2 buckets to waterproof my chimney. Went on easy and is holding up well.
Peter in Canada
Reviewed in Canada on January 25, 2025
Totally saved my concrete crown. Was fun to apply. I thought the container was small but finished the job with some left over.
Security_Geek
Reviewed in the United States on August 23, 2024
Worked well, it has a consistency similar to peanut-butter. Let it dry between coats. Effective to use duct tape to mark off above and below, then peel off the duct tape once dry for a nice clean line. I used 3 coats. For cracks, I used latex caulk, and was able to paint this on right over top of the caulk, no worries. I am happy that I used 3 large moving blankets that I taped to the chimney and draped underneath, as that caught a few drops and splashes. This is latex, so make sure you use in conjunction with genuine latex caulk, don't second guess the instructions and go silicone.
RN
Reviewed in the United States on August 10, 2024
I used this to seal the crowns I poured on our two chimneys. It worked as described, and I only used a fraction (less than 25%) of the half gallon tub to cover two chimneys (16" x 22").
Customer
Reviewed in the United States on December 25, 2024
worked well on my weathered 30 y/o chimney crown with proper preparation.
Brady Go
Reviewed in the United States on October 25, 2024
I put this product on top of my large chimney 4 years ago and it is still perfect. Keeps all moisture out was easy to apply and looks good if you could see it .
Chris
Reviewed in the United States on October 20, 2024
Used a metal brush to clean off debris, dirt, old sealer. The brushed off any dust. Filled any small cracks with Mor-Flex around flues, thenThin coated the cap with a brush and added at second thicker layer. Went on easy, not messy. Can’t speak to how well it seals yet, haven’t had any major rain fall.
Customer
Reviewed in the United States on October 14, 2024
I used this to paint my chimney crown a few months ago, and it looks very nice. There is a lot of sealant that comes in one container, more than one chimney really needs, so I put on three coats. It is much thicker and tougher than the sealant that had been on my chimney previously, and my chimney sweep said he was impressed with the quality of it.
Vicki morin
Reviewed in Canada on September 23, 2023
Couldn't buy this locally. Stopped leak in Chimney thank God.
C. Peters
Reviewed in the United States on December 16, 2023
This sealer seems to have done a great job in sealing up the very weathered and cracked crown on my 50 y.o. chimney. You have to apply a pretty heavy coat, and then a second coat after a few hours, but doing so filled up all the myriad cracks and chips and effectively made it waterproof, probably better than new. I'm hoping this will survive the elements for a lot more years.It seemed a bit pricey but if it lasts it will be worth it.
MA
Reviewed in Australia on April 7, 2022
Had a cracked crown that really leaked down into the chimney cavity. Found this stuff on Amazon. Got a chimney guy here in Australia to apply it while he was cleaning the chimney. Since then we've had record rain and no leaks so it must be working. The chimney guy in Australia hadn't heard of it before but was really impressed and did a deal where he took the remaining and reduced my bill! Time will tell if it lasts but so far it's saved me at least a few hundred dollars.
Moe
Reviewed in Canada on November 4, 2021
Wire brushed the cap, then applied only one thick coat as the temp was falling and rain was in the forecast. Luckily the rain held out for 5 or 6 hours and it all went smoothly. Went back up on the roof a week later and it was completely cured and bonded perfect. Used about 2/3rds of the pail will apply second coat in the spring. Time will tell if it lasts.Update...After a long cold winter it was perfect, used the rest of the pail to fill in any depressions etc in early spring. Looks great.
Recommended Products
$97.99
$ 39 .99 $39.99
$16.74
$ 7 .99 $7.99