DAP Dynaflex Ultimate Premium All-Weather Sealant
DAP Dynaflex Ultimate gives contractors a tough, flexible exterior seal for windows, doors, siding, trim, and other high-exposure areas. It’s built for wet surfaces, harsh weather, and fast turnaround when the job can’t wait.
This premium exterior sealant creates a 100% waterproof and crackproof seal while staying permanently flexible after curing. It works across a wide range of common exterior building materials, making it a reliable choice for siding crews, trim installers, window and door work, and general exterior sealing.
Why Contractors Choose It
🌧️ All-weather exterior performance for demanding jobsite conditions.
💧 Adheres to wet surfaces for more reliable application when conditions are not perfect.
🔒 100% waterproof and crackproof seal for long-lasting exterior protection.
↔️ Permanently flexible to handle movement around windows, doors, siding, and trim.
🌡️ Wide application temperature range from 20°F to 120°F.
🎨 Paintable and rain-ready in 30 minutes to help keep the job moving.
🧱 Excellent adhesion to wood, vinyl, PVC, metal, fiber cement, brick, concrete, stone, stucco, and more.
🛡️ Mold, mildew, and algae resistant for cleaner exterior joints over time.
👃 Low odor and VOC compliant for easier use on active jobsites.
🧼 Water cleanup before curing for faster, cleaner application.
📏 Meets ASTM C920 Class 50 performance standards.
How To Use
1. Cut the nozzle to the desired bead size and puncture the inner seal.
2. Apply sealant directly to the joint or gap, including damp surfaces when needed.
3. Tool the bead for full contact and a clean finish.
4. Allow proper cure time before heavy exposure or handling.
Contractor Notes
Use on exterior windows, doors, siding, trim, and other common building envelope details. Clean up with water before the sealant cures.
⚠️ California Proposition 65 Warning
This product may contain chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, visit www.P65Warnings.ca.gov.