Chimney Crown Sealer: Best Types & Frequency Of Use

Chimney crown sealing products come in handy when chimney crowns lose their watertight seal. This condition is mostly due to long-term exposure to extreme temperatures changes or variations.

The resulting chimney cracks lead to water seepage which penetrates the crown.

With moisture penetration, there’s an increased likelihood of the chimneys developing major issues. Common moisture-related problems with chimneys include rusting & linear deterioration, spalling, and damaged mortar.

You don’t want any of these developing issues developing, hence the need for a sealant.

About Chimney Crown Sealer

Chimney water repellents are specially formulated to offer moisture protection. As elastomeric sealers, they help stop water leaks while waterproofing your chimney crown from the elements

. These are also easy to apply as you only need a paintbrush for such application.

When using a chimney crown sealer, only about 2 coats of your preferred sealant need to be applied for lasting protection. However, you’ll need to follow the user instruction on the product label for best results.

The coverage area depends on the size of the product.

Chimney crown sealers come in different container sizes. The larger the container, the more area it covers.

However because the area of most chimney crowns is limited, the quantity needed won’t be much. You won’t have to worry about the exact volume needed when a pro is handling the job.

How Often Do I Need to Apply Chimney Crown Sealer?

Chimney crown sealers provide a temporary solution as they form a membrane that acts as protection against moisture penetration. As a temporary fix, such membrane lasts only a few years (typically 2 to 3 years) before it will need to be replaced.

This is the number of times or the frequency you’ll have to pay to have your chimney crown coated with a sealer. Your chimney crown’s condition also plays a role in determining whether a sealant will serve its purpose or not.

There are times when a crown has badly deteriorated. Under such conditions, the crown sealant won’t do much to keep out moisture. The most reliable solution will be to replace it with a new concrete crown.

This action is also known as resurfacing.

Types of Chimney Crown Sealants

When it comes to chimney crown sealants, there are several options to choose from.

A few of the top brand options include the CrownSeal Trowelable Sealant, Chimney Crown Sealer, ChimneyRX Brushable Crown Repair, Crown Coats and CrownGuard, etc.

For a better understanding of how these chimney crown sealants work, let’s have a look at each of them as follows;

  • CrownSeal Trowelable Sealant

CrownSeal Trowelable sealant offers a flexible waterproof coating for your chimney crown.

It comes ready to use with no need for mixing and cures within a 24 hour period from the time of application. It’s environmentally friendly and has a 10-year warranty.

This product remains permanently flexible after application.

If you’re looking for a chimney crown sealer that maintains the natural mortar or concrete look, this is the product for you. What more?

With CrownSeal Trowelable Sealant, there’s no need for a bonding agent.

  • Masonry Defender Chimney Crown Sealer

This permanently flexible chimney crown sealant product does an excellent job of keeping moisture out. It can be easily applied with the help of a chimney brush.

With this product, all you have to do is paint over your chimney crown surface.

About 2 layers of it will be enough to safeguard against moisture-related issues.

Starting at $39.99, this product offers value for money. With every application, it takes a few years (about 2 to 3 years) before you’ll need to reapply.

Masonry Defender also has other water sealant products on its stable such as Chimney Brick Sealer and Chimney Flashing Sealer.

What type of chimney crown material will this protect against?

Chimney crown sealer serves both concrete and mortar crowns. It’s a water-based product that’s environmentally friendly and easy to clean up.

  • ChimneyRX Brushable Crown Repair

Another chimney crown sealer you should consider is the ChimneyRX Brushable Crown Repair. This elastomeric coating product does not need special bonding agents or mixing.

It only needs to be applied onto the chimney crown using a brush and dries up in approximately 2 to 4 hours.

Starting at $61.17 per gallon, this product offers value for money and covers an area of about 40 square feet. All you need for proper application of chimney crown sealer is a three to a four-inch paintbrush.

While it’s environmentally free, it’s necessary to be extra cautious when using it.

This is due to the safety warning given by the manufacturer about the possibility of exposure to chemicals such as benzophenone and quartz. You may want to have a professional carry out your chimney crown waterproofing.

  • ChimneySaver Crown Coats

ChimneySaver’s Crown Coat is a brushable sealant used for chimney crown protection. It comes with a 15-year warranty, remains permanently flexible after application, and cures pretty fast (within a period of 2 to 4 hours).

What more? This chimney crown sealant comes ready to use.

As an environmentally friendly product, you have nothing to fear with its use. All you need for an effective application is a brush. Like other chimney crown sealants, you need to be wary about your safety.

This is due to possible exposure to chemicals benzophenone and quarts which are known carcinogens.

The application requires a thin film, followed by a heavier topcoat.

A gallon should serve your needs just fine as it covers an area of about 40 sq. ft

  • CrownGuard HP

With CrownGuard HP, your chimney crown is kept safe from water penetration. It’s a specially formulated product that’s designed to easily adhere to masonry surfaces.

This forms an impenetrable membrane against moisture. This results when all fractures on a chimney crown surface are covered.

As with most chimney crown sealants, this product can easily be applied using a brush. All you need to do is brush over such a surface with the help of your brush.

The superior bonding properties of this sealant create a rubber-like membrane that’s flexible.

CrownGuard HP serves in all weather conditions, thus protecting your chimney crown against freeze-thaw cycles.

These are some of the top chimney crown sealants you can use for your waterproofing needs.

However, it’s important to still mention that they’re only temporary and not a permanent fix to moisture-related problems.

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