Henry #212 All-Purpose Patching Sealant, 10.1 oz (Clear)

Henry’s #212 All-Purpose Patching Sealant is a versatile, ready-to-use solution designed for sealing and repairing a wide variety of surfaces. Its clear, elastomeric formula adheres tenaciously to metal, wood, concrete, masonry and most roofing materials—providing long-lasting protection against leaks, cracks and weather damage. Ideal as a prep coat under reflective coatings or as a standalone sealant, this 10.1-ounce cartridge dispenses easily and cures to a durable, paintable finish.

Whether you’re patching roof penetrations, sealing around windows and doors, or repairing gutters and plumbing boots, Henry #212 delivers professional-grade performance in any season. Its water-based design ensures soap-and-water cleanup, while the clear tint keeps repairs discrete and seamless.

Key Features

• Clear, elastomeric acrylic formula for seamless repairs
• Convenient 10.1 oz cartridge for caulking guns or manual application
• Adheres to metal, concrete, masonry, wood, and most roofing membranes
• Water-based for low-odor application and easy soap-and-water cleanup
• Fast skin-over time—minimizes runoff and drip
• Flexible & paintable finish resists cracking and UV degradation
• Ideal under reflective coatings or as a standalone roof sealant

Typical Applications

• Roof leaks around skylights, vents, chimneys and HVAC units
• Flashing, seams and coping joints on built-up and modified bitumen roofs
• Windows, doors, gutters, downspouts and siding transitions
• Parapet walls, gutters, pipes, conduits and metal roof panels

⚠️ WARNING: This product can expose you to Benz[a]anthracene known to the State of California to cause cancer. For more information, visit www.P65Warnings.ca.gov.

⚠️ WARNING: This product can expose you to butyl benzyl phthalate which is known to the State of California to cause birth defects or other reproductive harm. For more information, visit www.P65Warnings.ca.gov.