DAP Dynaflex 230 Sealant, 10.1 oz (Black)

DAP Dynaflex 230 is DAP’s most advanced indoor/outdoor premium latex sealant, engineered to deliver a permanently flexible, crack-proof seal in a sleek black finish. Its elastomeric formulation offers outstanding adhesion to a variety of substrates—plastic, glass, wood and more—while remaining waterproof, paintable and low-odor. Whether you’re filling expansion joints, sealing around windows and doors, or repairing gaps in trim and siding, Dynaflex 230 provides professional-grade performance you can trust.

Formulated to tool easily and clean up with water, Dynaflex 230 cures quickly to a durable seal that withstands temperature extremes from –30 °F to 180 °F. It meets ASTM C920 (Type S, Grade NS, Class 25), Federal Specification TT-S-00230C and CSA A23.1, making it an ideal choice for both DIY projects and commercial construction applications.

Key Features

• Permanently flexible, crack-proof elastomeric seal
• Waterproof and paintable with interior/exterior latex technology
• Low-odor formula for indoor use
• Adheres to plastic, glass, wood, metal and masonry
• Fills gaps up to 2 inches wide
• Covers up to 55 linear feet at a 3/16″ bead
• Meets ASTM C920, Type S, Grade NS, Class 25; TT-S-00230C; C834

⚠️ WARNING: This product can expose you to Silica, crystalline known to the State of California to cause cancer. For more information, visit www.P65Warnings.ca.gov.