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In places like the Pacific Northwest or the UK, brick walls can stay wet for months, especially on the side facing wind-driven rain. The best brick sealer for rainy climates makes rain bead and run off, so less water soaks in, while still letting the brick dry.
We compared breathable penetrating siloxanes and silane blends, and explain how to time application around wet weather.
Quick Answer: The Best Brick Sealer for Rainy Climates
- Best Overall: Prosoco Sure Klean Weather Seal Siloxane PD Water Repellent (1 gal)
- Best Widely Available: Drylok Siloxane 7 Brick & Masonry Penetrating Sealer (1 gal)
- Best for Chimneys: MasonryDefender Chimney Brick Sealer, Clear Water-Based Siloxane (1 gal, 2-Pack)
- Best Value: MasonryDefender Deep Penetrating Silane Siloxane Water Repellent (1 gal, 2-Pack)
- Best Silane/Siloxane Blend: Siloxane 9500 Ready-to-Use Silane/Siloxane Penetrating Sealer (1 gal)
- Best Sprayer: Chapin 19494 3.5-Gallon Industrial Concrete Sprayer, Tri-Poxy Steel
Prosoco Siloxane PD is the best brick sealer for rainy climates because it is breathable and designed for brick facades; Drylok Siloxane 7 is a widely available alternative, and MasonryDefender’s chimney sealer suits exposed chimneys.
Best Brick Sealer for Rainy Climates Comparison Table
| Product | Best For | Type | Key Feature | Buy |
|---|---|---|---|---|
| Prosoco Sure Klean Weather Seal Siloxane PD Water Repellent (1 gal) | Best Overall | Penetrating siloxane water repellent | Breathable, invisible water repellent | Check Price |
| Drylok Siloxane 7 Brick & Masonry Penetrating Sealer (1 gal) | Best Widely Available | Penetrating siloxane sealer | Penetrating, traffic-rated per listing | Check Price |
| MasonryDefender Chimney Brick Sealer, Clear Water-Based Siloxane (1 gal, 2-Pack) | Best for Chimneys | Penetrating siloxane sealer | Breathable siloxane for chimneys | Check Price |
| MasonryDefender Deep Penetrating Silane Siloxane Water Repellent (1 gal, 2-Pack) | Best Value | Silane/siloxane penetrating sealer | Deep penetrating water repellent | Check Price |
| Siloxane 9500 Ready-to-Use Silane/Siloxane Penetrating Sealer (1 gal) | Best Silane/Siloxane Blend | Silane/siloxane penetrating sealer | DOT-approved per listing, salt and water repellent | Check Price |
| Chapin 19494 3.5-Gallon Industrial Concrete Sprayer, Tri-Poxy Steel | Best Sprayer | Industrial pump sprayer | Steel tank, chemical-resistant seals | Check Price |
The 6 Best Brick Sealers for Rainy Climates
Our picks for the best brick sealer for rainy climates.
Prosoco Sure Klean Weather Seal Siloxane PD Water Repellent (1 gal)
1Prosoco’s Siloxane PD is a professional penetrating water repellent for brick and masonry walls.
👍 Pros & Cons
Pros
- Pro brand used on brick facades
- Breathable, does not trap moisture
- Natural, non-glossy look
Cons
- Not a stain or color
- Needs dry, clean brick
📄 Detailed Review
- Type: Penetrating siloxane
- Finish: Invisible / natural look
- Base: Water-based
- Best for: Exterior brick and masonry walls
Penetrating siloxanes soak into masonry and make it shed water while still letting vapor escape, which is why they are favored for exterior brick and chimneys.
Apply to dry, clean brick and follow the label’s saturation directions.
Drylok Siloxane 7 Brick & Masonry Penetrating Sealer (1 gal)
2Drylok Siloxane 7 is a widely available penetrating sealer for brick and masonry, including traffic surfaces.
👍 Pros & Cons
Pros
- Trusted masonry waterproofing brand
- Listed for vehicle traffic
- Penetrating, breathable
Cons
- Goes on milky white
- Two coats may be needed on porous brick
📄 Detailed Review
- Type: Penetrating siloxane
- Finish: Clear when dry (goes on milky)
- Base: Water-based
- Best for: Brick, pavers, masonry
It goes on milky and dries clear. Penetrating formulas protect without the slippery film of acrylics.
Do a test patch to check the final look.
MasonryDefender Chimney Brick Sealer, Clear Water-Based Siloxane (1 gal, 2-Pack)
3A breathable siloxane sealer marketed specifically for chimney brick.
👍 Pros & Cons
Pros
- Made for chimneys
- Breathable waterproofer
- Clear
Cons
- Does not fix cracked crowns or flashing
- Two-gallon pack
📄 Detailed Review
- Type: Penetrating siloxane
- Finish: Clear
- Base: Water-based
- Best for: Chimneys and exterior vertical masonry
Chimneys need breathable sealers so moisture inside the masonry can escape.
Repair crowns, flashing and mortar first.
MasonryDefender Deep Penetrating Silane Siloxane Water Repellent (1 gal, 2-Pack)
4MasonryDefender’s silane siloxane is a deep penetrating water repellent sold in a two-gallon pack.
👍 Pros & Cons
Pros
- Deep penetrating formula
- Two gallons per order
- Breathable
Cons
- Two-pack is more than small jobs need
- Not for glossy look
📄 Detailed Review
- Type: Silane/siloxane penetrating
- Finish: Natural look
- Base: Water-based
- Best for: Concrete, brick, block
Good for larger walls, block and concrete where you want water beading without changing the look.
Spray with a low-pressure pump sprayer.
Siloxane 9500 Ready-to-Use Silane/Siloxane Penetrating Sealer (1 gal)
5A ready-to-use silane/siloxane penetrating sealer listed for pavers, brick and stone.
👍 Pros & Cons
Pros
- Silane/siloxane blend penetrates deep
- Salt and water repellent
- Listed coverage 150-400 sq ft per gallon
Cons
- Coverage varies with porosity
- No color enhancement
📄 Detailed Review
- Type: Silane/siloxane penetrating
- Finish: Natural look
- Base: Water-based, ready to use
- Best for: Pavers, driveways, brick, stone
Silane/siloxane blends penetrate dense and porous masonry, useful in freeze-thaw areas where salt and water cause spalling.
Apply until the surface is evenly wet, avoiding puddles.
Chapin 19494 3.5-Gallon Industrial Concrete Sprayer, Tri-Poxy Steel
6Chapin’s industrial concrete sprayer handles big paver and wall jobs.
👍 Pros & Cons
Pros
- Chemical-resistant seals
- Large tank
- Brass components
Cons
- Heavy when full
- Higher cost
📄 Detailed Review
- Capacity: 3.5 gallons
- Tank: Tri-Poxy steel
- Best for: Large paver and masonry jobs
Chemical-resistant seals make it better for a wider range of sealers.
Check seal compatibility with your sealer.
How We Chose the Best Brick Sealer for Rainy Climates
To choose the best brick sealer for rainy climates, we compared breathable penetrating sealers for how well they shed water, how they handle long wet seasons, coverage and ease of application in short dry windows.
Rain penetrating walls can cause damp indoors; the EPA explains moisture in its EPA guide to mold and moisture.
Product details in this guide come from manufacturer specifications and patterns in verified owner feedback; we do not claim hands-on testing we have not done. Read more on our How We Test page.
Buying Guide: Best Brick Sealer for Rainy Climates
Tips for the best brick sealer for rainy climates.
Wind-driven rain walls
Seal the most exposed elevations first; sheltered walls may not need it.
Wait for a dry window
Brick must be dry for sealer to penetrate; wait for several dry days.
Breathable always
Wet climates need brick that can dry out; avoid film coatings.
Fix gutters and sills
Overflowing gutters and failed sills soak walls regardless of sealer.
Efflorescence warning
White salts mean water is moving through brick; fix sources first.
Check after storms
Look for darker, damp patches to find problem areas.
Sealing in a Wet Climate
Make the most of dry spells.
- Check the forecast for several dry days.
- Clean and let brick dry.
- Spray exposed walls first.
- Avoid sealing before rain.
Questions about the best brick sealer for rainy climates:
Frequently Asked Questions
What is the best brick sealer for rainy climates?
The best brick sealer for rainy climates is a breathable siloxane like Prosoco Siloxane PD.
Can I seal brick when it is damp?
No. Brick should be dry so sealer can penetrate.
Do all walls need sealing?
Mainly walls exposed to wind-driven rain.
How long does it last in wet climates?
Often several years; check water beading.
Will sealer stop damp inside?
It helps if rain penetration is the cause; fix gutters and sills too.
Final Verdict
Our final pick for the best brick sealer for rainy climates is the Prosoco Siloxane PD. Choose the Drylok Siloxane 7 if you want a widely available alternative, or the MasonryDefender Chimney Sealer for exposed chimneys.
Related Guides
More exterior brick guides:
- Best Faux Brick on Amazon
- Best Brick Sealer for Humid Climates
- Best Brick Sealer for Freeze Thaw Climates
- Best Brick Sealer for Painted Brick
- Best Brick Sealer for a Kitchen Backsplash
Product details are based on manufacturer specifications at the time of writing. Prices and availability change often, so check Amazon for the latest price.
