Top 10 chimney waterproofing sealant for 2022

What are criterias of the best chimney waterproofing sealant? It is not easy to find the answer. We spent many hours to analyst top 10 chimney waterproofing sealant and find the best one for you. Let’s find more detail below.

Best chimney waterproofing sealant

Product Features Editor's score Go to site
ChimneySaver Water-Base Water Repellent (5 Gallon) ChimneySaver Water-Base Water Repellent (5 Gallon)
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ChimneySaver VOC Compliant Solvent-Based Water Repellent, 1 Gallon ChimneySaver VOC Compliant Solvent-Based Water Repellent, 1 Gallon
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ChimneyRX Masonry Chimney Water Repellent, 1 Gallon ChimneyRX Masonry Chimney Water Repellent, 1 Gallon
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ChimneyRx Masonry Fireplace Crack & Joint Sealant - 1 Pint ChimneyRx Masonry Fireplace Crack & Joint Sealant - 1 Pint
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RAIN Guard PRO-CR-0356 Micro-Seal 1 Gal Clear Penetrating Silane Siloxane Professional Grade Water Repellent Sealer  Water Based Concrete Sealer, 10 Yr Warranty RAIN Guard PRO-CR-0356 Micro-Seal 1 Gal Clear Penetrating Silane Siloxane Professional Grade Water Repellent Sealer Water Based Concrete Sealer, 10 Yr Warranty
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ChimneySaver Water-Base Water Repellent with Stain Blocker, 1 Gallon ChimneySaver Water-Base Water Repellent with Stain Blocker, 1 Gallon
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Chimney Brick Sealer, Clear Water-Based Siloxane Sealer - Breathable Waterproofer for All Exterior, Vertical Masonry Surfaces, 1 gal Chimney Brick Sealer, Clear Water-Based Siloxane Sealer - Breathable Waterproofer for All Exterior, Vertical Masonry Surfaces, 1 gal
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MasonryDefender Chimney Flashing Sealer - Flexible Coating That Protects Chimney Flashings from Water Leaks MasonryDefender Chimney Flashing Sealer - Flexible Coating That Protects Chimney Flashings from Water Leaks
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MasonryDefender Chimney Crown Sealer - Brushable Sealant Fixes Cracked Chimney Tops & Prevents Chimney Leaks MasonryDefender Chimney Crown Sealer - Brushable Sealant Fixes Cracked Chimney Tops & Prevents Chimney Leaks
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Liquid Rubber Waterproof Sealant - Multi-Surface Leak Repair Indoor and Outdoor Coating, Water-Based, Easy to Apply, Original Black, 1 Gallon Liquid Rubber Waterproof Sealant - Multi-Surface Leak Repair Indoor and Outdoor Coating, Water-Based, Easy to Apply, Original Black, 1 Gallon
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1. ChimneySaver Water-Base Water Repellent (5 Gallon)

Feature

Can be Applied On Damp Surfaces
Non Combustible and has no chemical odor
1 gallon covers approx. 100 square feet
Allows your Bricks To Breath. Prevents Brick chaefing.

2. ChimneySaver VOC Compliant Solvent-Based Water Repellent, 1 Gallon

Feature

10 Year Warranty, 100% Vapor Permeable
Non-Glossy Look, Efflorescence Protection
Waterproofs Brick & Masonry Surfaces
Freeze/Thaw Protection
VOC Compliant in All States

3. ChimneyRX Masonry Chimney Water Repellent, 1 Gallon

4. ChimneyRx Masonry Fireplace Crack & Joint Sealant - 1 Pint

Feature

Brushable elastomeric sealant for mortar joints used to repair exterior cracks in mortar on chimneys, brick walls and between concrete or stone masonry units
The product seals larger cracks and other defects that cannot be corrected with water repellents alone
Crack & Joint Sealant seals crack up to 1/8" wide on brick faces and at mortar and brick joint interfaces to provide waterproof protection
It dries to a clear, translucent, milky film
When applied to a properly prepared wall or chimney surface, Crack & Joint Sealant can solve tough leak problems without the expense of truck pointing or surface grouting

5. RAIN Guard PRO-CR-0356 Micro-Seal 1 Gal Clear Penetrating Silane Siloxane Professional Grade Water Repellent Sealer Water Based Concrete Sealer, 10 Yr Warranty

Feature

Water Based Concrete Sealer: Restore, protect and extend the life of any masonry horizontal or vertical surface with a high-performance hydrophobic coating
Clear Spray Sealant: The concrete sealer does not alter surface appearance. It does not leave a surface film. Made using no-sheen and non-yellowing formula
The clear waterproof spray is to be used as a primer before painting to prohibit moisture transfer in the substrate and to protect from stains such as oil, gas and anti-freeze
Water Repellent: 100% penetrating coating provides excellent resistance to water, salt spray, ice removal agents and wind driven rain
Rainguard water repellent sealer protects your investment with a 10-year satisfaction and can be used anywhere in the country

6. ChimneySaver Water-Base Water Repellent with Stain Blocker, 1 Gallon

Feature

Reduces Water Penetration by 99.9% & 100% Vapor Permeable
Products Won't Alter Surface Color & Appearance
Multiple Product Options!
Warranties Available

7. Chimney Brick Sealer, Clear Water-Based Siloxane Sealer - Breathable Waterproofer for All Exterior, Vertical Masonry Surfaces, 1 gal

Feature

CLEAR PROTECTION Provides a long-lasting, non-glossy invisible coat to masonry surfaces. Will never leave any residue or alter the color or appearance of your brick chimney, stone chimney, or other type of masonry chimney. Masonry waterproofer that will last for up to 5 years
WATER SEALANT Water-based, siloxane penetrating brick sealer that bonds with the minerals in masonry to provide with you long-lasting water protection. The breathable sealer causes the water to bead instead of seeping into the brick pores, causing chimney leaks
POWERFUL CHIMNEY SEALER Keep your chimney leak free and protect it or other masonry surfaces from spalling, flaking, or cracking. Best suited to protect against freeze thaw damage, and white efflorescence.
EASY TO APPLY First step is to ensure your chimney or masonry surface is fully cleaned and clear of dirt, dust, grease, oil, efflorescence, etc. Use a low-pressure pump-up garden sprayer to evenly coat your chimney. 1 gallon will give 90-150 sq.ft. of coverage
5 YEAR WARRANTY MasonryDefender offers a 5 Year Limited Warranty on Vertical Masonry Surfaces

8. MasonryDefender Chimney Flashing Sealer - Flexible Coating That Protects Chimney Flashings from Water Leaks

Feature

Seals & Waterproofs Chimney Flashings - Stops Water Penetration Where Chimneys Meet the Roof Line
Flexible - Won't Crack or Chip - Stays Flexible Over Time, Doesn't Harden and Become Brittle
Helps Prevent Chimney Leaks - Chimneys Frequently Leak Where the Roofline Meets the Chimney - Seal it to Stop Water Fast
Easy to Apply With a Paint Brush - Simply Paint Product Around Base of Chimney for Long Lasting Protection
Available in Black & Covers 14 Sq. Ft. Per Half Gallon Container

9. MasonryDefender Chimney Crown Sealer - Brushable Sealant Fixes Cracked Chimney Tops & Prevents Chimney Leaks

Feature

Seals and Waterproofs Chimney Crowns - Stop Water Leaks Fast With This Elastomeric Sealer Designed Specifically for Chimneys
Permanently Flexible Sealant - Won't Crack or Chip Over Time, Stays Flexible
Long Lasting Sealant Helps Prevent Chimney Leaks - Lasts for Years
Easy to Apply With a Paint Brush - Simply Brush 2 Coats of Product On Chimney Crowns for Superior Protection
Great Coverage - Covers 20 Sq. Ft. per Half Gallon Container

10. Liquid Rubber Waterproof Sealant - Multi-Surface Leak Repair Indoor and Outdoor Coating, Water-Based, Easy to Apply, Original Black, 1 Gallon

Feature

PROTECTIVE FINISH FOR - Flat roofs, metal roofs, sloped roofs, planter boxes, foundations, sheds, basements, metal, wood, concrete and more
PROTECTIVE FINISH FOR - Flat roofs, metal roofs, sloped roofs, planter boxes, foundations, sheds, basements, metal, wood, concrete and more
HIGHLY FLEXIBLE & DURABLE - Final membrane has over 1000% elongation preventing adhesion failure, and is UV Stable stopping the sun from degrading the product
COVERAGE - Vertical Surfaces - 1 gallon/30 sq ft (2.8 sq m). 3-4 heavy coats to achieve a 30 mil (0.76 mm) membrane. Flat/Ponding Surfaces - 1 gallon/15 sq ft (1.4 sq m). 4-5 heavy coats to achieve a 60-80 mil (1.5-2 mm) membrane
ENVIRONMENTALLY FRIENDLY - Liquid Rubber Waterproof Sealant/Coating is water based, containing no solvents, VOC's or harmful odors. Safe for humans and pets alike, can be used indoors and outdoors with no special breathing apparatus
FOR A BULLETPROOF SYSTEM - Bridge joints, seams, vents, gaps, protrusions. With Liquid Rubber Seam Tape or Liquid Rubber Geo-Textile where possible movement may occur

Conclusion

By our suggestions above, we hope that you can found the best chimney waterproofing sealant for you. Please don't forget to share your experience by comment in this post. Thank you!

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