Henry Moistop Sealant 10.1 oz. White

Moistop Sealant is a high-performance polyurethane sealant engineered for long-lasting weatherproofing and moisture control. Its resilient, elastic formula adheres to a wide range of building materials—creating a continuous, watertight bead around windows, doors, and flashing systems. Ideal for new construction, renovation, or repair projects, Moistop delivers reliable protection against air infiltration, water intrusion, and substrate movement.

Whether you’re installing exterior window flanges or sealing gaps in siding and trim, this versatile sealant strikes a perfect balance between flexibility and durability. Its smooth, non-sagging consistency makes application clean and precise, ensuring professional-grade results every time.

Key Features

• Exceptional adhesion to vinyl, wood, aluminum and most common building materials
• UV* and weather-resistant formula maintains flexibility through freeze-thaw cycles
• Complies with ASTM C-920 and AAMA 808.3-92 performance standards
• Smooth, non-shrinking bead stays in place—no cracking or chipping
• Easy toolability for neat finishing; paintable after skin-over
• Suitable for vertical and horizontal joints around windows, doors, siding and flashing

⚠️ WARNING: This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, visit www.P65Warnings.ca.gov.