WaterLock Chimney Flashing Sealant

The Ultimate Flexible Sealant for Chimneys, Stacks, and Vents

Stop chasing stubborn roof leaks. WaterLock Flashing Sealant is a professional-grade, elastomeric coating designed to permanently solve leaking problems around your roof's most vulnerable areas. It forms a thick, flexible, and completely waterproof membrane that bridges the gap between your roofing materials and masonry or metal fixtures.

Whether you are sealing around a chimney base, securing metal flashings, or waterproofing plumbing stacks and vents, WaterLock creates a weather-tight bond that stands up to the harshest elements.

Why Choose WaterLock Flashing Sealant?

• Permanent Multi-Surface Adhesion: Engineered to bond aggressively to the most common (and difficult) roofing materials, including brick, metal flashings, and asphalt shingles.

• Flexible Waterproof Membrane: Unlike traditional roofing tar or caulk that dries out, cracks, and fails, WaterLock remains flexible. It stretches and moves with your home as temperatures change, ensuring the seal never breaks.

• Customizable Colors: Available in standard Black and White. Need to match a specific roof or brick color? The White formula is easily tintable—just mix in a little standard mortar dye to achieve your perfect custom shade!

• 10-Year Warranty: Do the job once and do it right. Every container comes with a warranty card guaranteeing 10 years of reliable, leak-free performance.

Coverage & Reinforcement Fabric

For the ultimate, tear-proof seal, we highly recommend using WaterLock Flashing Sealant in conjunction with our reinforcing fabric.

• Sealant Coverage: One gallon of WaterLock Flashing Sealant covers approximately 28 linear feet.

• Reinforcement Fabric (Sold Separately): Available in convenient 6-inch wide by 150-foot rolls. A single roll of fabric provides enough material to last through 5 to 6 pails of WaterLock sealant.