April 1, 2026

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10 Best brick sealer for chimneys of 2026

Save up to 20% off

Best Choice

1

Prosoco

PROSOCO Sure Klean Weather Seal Siloxane PD - Great Water-Based Brick Sealer
9.7

Exceptional

Our Rating
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Value for Money

2

MasonryDefender
MasonryDefender Chimney Flashing Sealer - Flexible Chimney Sealant Protects Against Water Leaks - 2.2 kg
Main highlights

Key Features
Seals and waterproofs chimney flashings, remains flexible, easy to apply, prevents leaks. Available in black, covers 14 sq. ft. per half gallon.

Ideal Use Cases
Perfect for sealing where chimneys meet roof lines, especially effective in preventing water penetration and subsequent damage in leak-prone areas.

Customer Reviews
Customers highly praise its ease of application with a paint brush and its lasting effectiveness in preventing chimney leaks and water damage.
9.6

Exceptional

Our Rating

8.9
worth the money

8.9
Simple to use
3

MasonryDefender
MasonryDefender Chimney Brick Sealer, Clear Water-Based Siloxane Sealer - Breathable Waterproofer For All Exterior, Vertical Masonry Surfaces - 1 Gal
Main highlights

Long-lasting Invisible Protection
Provides a non-glossy, invisible coat that protects masonry for up to 5 years without altering appearance.

Ideal for Chimney Waterproofing
Perfect for protecting brick chimneys from water damage, spalling, and freeze-thaw cycles.

Easy Application Praised by Users
Customers appreciate the simple application process using a garden sprayer.
Key specs
- coverage:90-150 sq.ft.
- item form:Liquid
- size:11.85 x 7.68 x 4.45 inches
- surface:Masonry surfaces
- material:Siloxane
9.5

Excellent

Our Rating

9.9
Simple to use

9.9
Absorbency

9.7
Fashion
4

MasonryDefender
MasonryDefender Chimney Brick Sealer, Clear Water-Based Siloxane Sealer - Breathable Waterproofer For All Exterior, Vertical Masonry Surfaces - 1 Gal
Main highlights

Long-lasting Invisible Protection
Provides a non-glossy, invisible coat that protects masonry for up to 5 years without altering appearance.

Ideal for Chimney Waterproofing
Perfect for protecting brick chimneys from water damage, spalling, and freeze-thaw cycles.

Easy Application Praised by Users
Customers appreciate the simple application process using a garden sprayer.
Key specs
- coverage:90-150 sq.ft.
- item form:Liquid
- size:11.85 x 7.68 x 4.45 inches
- surface:Masonry surfaces
- material:Siloxane
9.4

Excellent

Our Rating

9.9
Simple to use

9.9
Absorbency

9.7
Fashion
5

CHIMNEYRX
ChimneyRx 300119 Masonry Chimney Water Repellent - Siloxane Based, Non-Film-Forming, Breathable, and Transparent Waterproof Coating for Brick Chimneys & Other Vertical Surfaces - 1 Gallon

20% Off
Main highlights

Waterproofing Performance
Provides a reliable barrier against water infiltration, protecting masonry surfaces from damage.

Ideal for New Chimneys
Perfect for new cement block chimneys to prevent water damage and extend lifespan.

Customer Satisfaction
Highly praised for effectively eliminating water leaks after application.
9.2

Excellent

Our Rating

9.7
Simple to use

9.5
Water tight

9.1
worth the money
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6

MasonryDefender
MasonryDefender Brick Sealer Satin Sheen - Water Based, Reduces Dust, Easy Clean - 1 Gallon
Main highlights

Versatile Application
Works as both an interior and exterior brick sealer for masonry walls.

Ideal for Dust Reduction
Perfect for minimizing brick dust on interior walls, creating a cleaner environment.

Praised for Easy Cleanup
Highly rated for its low odor and easy cleanup after application.
9.0

Excellent

Our Rating

9.5
Simple to use

9.3
Fashion

9.1
worth the money
7

MasonryDefender
MasonryDefender Brick Sealer Satin Sheen - Water Based, Reduces Dust, Easy Clean - 1 Gallon
Main highlights

Versatile Application
Works as both an interior and exterior brick sealer for masonry walls.

Ideal for Dust Reduction
Perfect for minimizing brick dust on interior walls, creating a cleaner environment.

Praised for Easy Cleanup
Highly rated for its low odor and easy cleanup after application.
8.8

Very Good

Our Rating

9.5
Simple to use

9.3
Fashion

9.1
worth the money
8

MasonryDefender
MasonryDefender Chimney Crown Sealer - Brushable Waterproof Sealant Prevents Leaks - 1/2 Gallon
Main highlights

Key Features
Elastomeric sealer for chimneys, prevents water leaks, permanently flexible, easy to apply, covers 20 sq. ft. per half gallon.

Ideal Use Cases
Best for sealing and waterproofing chimney crowns, ideal for maintenance and repair, preventing long-term weather-related damage.

Customer Reviews
Highly praised for its durability and effectiveness in stopping leaks, users appreciate its long-lasting protection and ease of application.
8.7

Very Good

Our Rating

9.9
Easy installation

9.9
Precision

9.9
Simple to use
9

MasonryDefender
MasonryDefender Chimney Crown Sealer - Brushable Waterproof Sealant Prevents Leaks - 1/2 Gallon
Main highlights

Key Features
Elastomeric sealer for chimneys, prevents water leaks, permanently flexible, easy to apply, covers 20 sq. ft. per half gallon.

Ideal Use Cases
Best for sealing and waterproofing chimney crowns, ideal for maintenance and repair, preventing long-term weather-related damage.

Customer Reviews
Highly praised for its durability and effectiveness in stopping leaks, users appreciate its long-lasting protection and ease of application.
8.6

Very Good

Our Rating

9.9
Easy installation

9.9
Precision

9.9
Simple to use
10

MasonryDefender
MasonryDefender Chimney Flashing Sealer - Flexible Chimney Sealant Protects Against Water Leaks - 2.2 kg
Main highlights

Key Features
Seals and waterproofs chimney flashings, remains flexible, easy to apply, prevents leaks. Available in black, covers 14 sq. ft. per half gallon.

Ideal Use Cases
Perfect for sealing where chimneys meet roof lines, especially effective in preventing water penetration and subsequent damage in leak-prone areas.

Customer Reviews
Customers highly praise its ease of application with a paint brush and its lasting effectiveness in preventing chimney leaks and water damage.
8.5

Good

Our Rating

8.9
worth the money

8.9
Simple to use

10 Best brick sealer for chimneys of 2026

1

PROSOCO Sure Klean Weather Seal Siloxane PD - Great Water-Based Brick Sealer

How do we rank?

How do we rank?

Analyzing top stores

2

MasonryDefender Chimney Flashing Sealer - Flexible Chimney Sealant Protects Against Water Leaks - 2.2 kg

8.9

8.9

3

MasonryDefender Chimney Brick Sealer, Clear Water-Based Siloxane Sealer - Breathable Waterproofer For All Exterior, Vertical Masonry Surfaces - 1 Gal

9.9

9.9

9.7

4

MasonryDefender Chimney Brick Sealer, Clear Water-Based Siloxane Sealer - Breathable Waterproofer For All Exterior, Vertical Masonry Surfaces - 1 Gal

9.9

9.9

9.7

5

ChimneyRx 300119 Masonry Chimney Water Repellent - Siloxane Based, Non-Film-Forming, Breathable, and Transparent Waterproof Coating for Brick Chimneys & Other Vertical Surfaces - 1 Gallon

9.7

9.5

9.1

6

MasonryDefender Brick Sealer Satin Sheen - Water Based, Reduces Dust, Easy Clean - 1 Gallon

9.5

9.3

9.1

7

MasonryDefender Brick Sealer Satin Sheen - Water Based, Reduces Dust, Easy Clean - 1 Gallon

9.5

9.3

9.1

8

MasonryDefender Chimney Crown Sealer - Brushable Waterproof Sealant Prevents Leaks - 1/2 Gallon

9.9

9.9

9.9

9

MasonryDefender Chimney Crown Sealer - Brushable Waterproof Sealant Prevents Leaks - 1/2 Gallon

9.9

9.9

9.9

10

MasonryDefender Chimney Flashing Sealer - Flexible Chimney Sealant Protects Against Water Leaks - 2.2 kg

8.9

8.9

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