West System 209 Extra Slow Hardener

West System 209 Extra Slow Hardener is formulated specifically for use with West System Brand 105 Resin for general coating and bonding applications in extremely warm and/or humid conditions or when extended working time is desired at room temperature.

Features:

• Provides approximately twice the working time of 206 Slow Hardener
• 105 / 209 mixture forms a high-strength, moisture-resistant solid with excellent bonding and barrier coating properties
• Wets out and bonds to wood fiber, fiberglass, reinforcing fabrics, foam and other composite materials, and a variety of metals
• 105 / 209 mixture can be thickened with West System fillers to bridge gaps and fill voids and can be sanded and shaped when cured
• With roller applications, has excellent thin-film characteristics, allowing it to flow out and self-level without "fish-eyeing"
• Multiple coats of 105 / 209 create a superior moisture barrier and a tough, stable base for paints and varnishes
• Formulated without volatile solvents
• Has a relatively high flash point, no strong solvent odor and does not shrink after curing
• Not intended for clear-coating natural finished wood

Handling characteristics:

• Mix ratio: (3) parts resin : (1) part hardener
• Pot life at 72°F (22°C): 40 to 50 minutes
• Pot life at 95°F (35°C): 15 to 20 minutes
• Cure to solid state at 72°F (22°C): 20 to 24 hours
• Cure to solid state at 95°F (35°C): 6 to 8 hours
• Cure to maximum strength: 4 to 9 days
• Minimum recommended temperature for curing: 70°F (21°C)

Safety Data Sheet