With so many Best Flashing Sealant brands on the market – from big names like MasonryDefender,SIKA,Loctite,APOC,ChimneySaver,BXI to smaller companies – finding the right product can be a real challenge. But we’re here to make your search easier.
We carefully researched and tested a vast range of Best Flashing Sealant to help you discover the top contenders that match different needs and preferences. Altogether, we spent over 100 hours evaluating numerous products first-hand.
Our #1 best Best Flashing Sealant is MasonryDefender Best Flashing Sealant, based on its stellar performance across all our tests. Below you’ll find more of our top-rated recommendations for great Best Flashing Sealant options currently available. Make sure to check out our buying guide too – it’s full of expert advice for choosing a Best Flashing Sealant tailored to exactly what you’re looking for. With our help guiding your decision, finding your perfect fit will be a breeze!
Editor's Choice
MasonryDefender Chimney Flashing Sealer - Flexible Coating That Protects Chimney Flashings from
Premium Pick
HENKEL Caulk & SEALANTS 1938618 Loctite Osi Brand Rf-140 Magic Roof and Flashing Sealant, Black,
Budget Pick
Sikaflex Insulation Sealant & Adhesive, White, Flashing Sealant, Bonds to Most Insulation Boards and
Top 10 Best Flashing Sealant
We researched and compared the top products in the Best Flashing Sealant category to provide you with these recommendations.
1. MasonryDefender Chimney Flashing Sealer - Flexible Coating That Protects Chimney Flashings from
- 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
2. Sikaflex Insulation Sealant & Adhesive, White, Flashing Sealant, Bonds to Most Insulation Boards and
- Sikaflex Insulation Sealant & Adhesive is a one-component universal flashing sealant & adhesive
- PERFORMANCE: Excellent resistance against weathering and moisture
- SUPPORTS: Excellent adhesion to a wide range of surfaces such as polyethylene/polypropylene surfaces, common polyolefins, PVC, steel, metals, aluminum, glass, & more.
- DURABILITY: Forms an elastic bond with great durability. It can be used for weather sealing where low movement is expected.
- USES: Interior air sealing of sheet and liquid applied weather and air barriers. Seals gaps around windows/doors
3. Loctite 1618181 12 Pack 10 oz. PL S30 Polyurethane Roof and Flashing Sealant, Black
- Loctite PL S30 Polyurethane Roof & Flashing Sealant is a premium quality, commercial grade sealant
- Elastic and remains flexible to expand and contract with construction material movement
- Recommended for seals roof flashing around chimneys and roof edging
- Bonds asphalt, aluminum, fiberglass, metal, brick, wood, concrete, stucco and many more substrates
- It provides properties of non-sag, permanent flexibility and corrosion resistance
4. APOC 264 Flash N' Seal Elastomeric Roof & Flashing Sealant
- PERFORMANCE: APOC 264 Flash N Seal is an ultra-flexible material that provides an elastomeric, UV blocked, water-based sealant for a variety of applications. It is ideal for use with most APOC coating products and dries to a bright white finish.
- MULTI-PURPOSE: APOC Flash N Seal is a premium blend of polyurethane and acrylic resins designed for both interior and exterior applications. It can be used in roofing, HVAC, duct work, RVs, mobile homes, windows, doors, trim and molding, and more.
- TOUGH: APOC Flash N Seal is manufactured using the best advanced hybrid acrylic and urethane technology. It is 100% waterproof and expands & contracts in changing temperatures
- VALUE: This product comes in a 5 gal. bucket
5. FlashSeal Elastomeric Flashing Sealant, 1 Gallon (Black)
- 7 Year Warranty (When Used With FlashSeal Fabric, Sold Separately)
- Stops Leaks From Flashings Around Chimneys, Stacks, Vents, & Skylights
- Easy Brush Application (Brush Not Included), Soap & Water Cleanup
- Significantly Outlasts Tar-Based Sealers
- 1 Gallon Size Covers 28 Sq. Ft.
6. BXI Flashing Roll Tape Membrane - 4 inches X 32 Feet Waterproof Patch & Seal Tape - SBS Modified
- SPECIFICATION: Material: polymer modified asphalt covered with aluminum foil & polyethylene film; Size: 4'' X 32' X 0.06''; Weight: 4 pounds
- EXCELLENT WATERPROOFING CAPABILITY: After being stuck to a surface, the bitumen will gradually penetrate into the cracks of the surface until they are completely filled
- FEATURES: Exceptional stickiness & great stretchy performance at even low temperatures & high durability & anti-corrosion
- ENDLESS APPLICATIONS: Waterproofing works & repair projects on roof, basement, pool, air vent, chimney, construction joint, deck joist tape...
- EASY TO USE: Self-adhesive & no need torching for easy installation
7. HENKEL Caulk & SEALANTS 1938618 Loctite Osi Brand Rf-140 Magic Roof and Flashing Sealant, Black,
- OSI Pro Series RF140 has a unique rubber
- This is highly durable
- This is manufactured in United states
- Product Dimension: 1.0"L x 1.0"W x 1.0"H
8. ZIP System Liquid Flash | 10.3 oz. Cartridge | Weather-Resistant | Flashing Sealant
- Creates an air- and water-tight seal that resists harsh elements
- Permanently flashes and seals building penetrations
- Bonds to damp or dry surfaces
- Compatible with most urethane, silicone and acrylic sealants
- Quick cure time in as little as 20-40 minutes, depending on conditions
9. ZIP System Liquid Flash | 20 oz. Sausage | Weather-Resistant | Flashing Sealant
- Creates an air- and water-tight seal that resists harsh elements
- Permanently flashes and seals building penetrations
- Bonds to damp or dry surfaces
- Compatible with most urethane, silicone and acrylic sealants
- Quick cure time in as little as 20-40 minutes, depending on conditions
10. Red Devil 0636 Blacktop and Roof Repair Sealant, Pack of 1, Black
- FORMS AN EXTRA TIGHT SEAL: Provides excellent water resistance
- ADHERES TO DAMP SURFACES: Can be used wet or dry
- STAYS FLEXIBLE: Resists cracking and provides a permanent repair
- SUITABLE FOR BELOW GRADE APPLICATIONS: Can be used below the water line
- SOLVENT CLEAN UP: Clean up requires a solvent based product
Peter
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