Sika Sikaflex-221 Multi-Purpose Polyurethane Sealant and Adhesive

Sika Sikaflex-221 is a versatile 1-component polyurethane sealant and adhesive designed for durable, elastic bonding. It cures with moisture to form a flexible, weather-resistant seal suitable for various materials.

Features:

• Provides strong adhesion to multiple substrate types including wood and metals
• Maintains elasticity and durability under varying environmental conditions
• Resists aging, weathering, and corrosion for long-lasting performance
• Low odor formula suitable for indoor and outdoor applications
• Can be sanded and painted over after curing for seamless finishes
• Meets safety standards for potable water and fire resistance
• Non-sag consistency ensures clean and precise application

Specifications:

• Chemical Base: 1-Component Polyurethane
• Cure Mechanism: Moisture-Curing
• Density (Uncured): 1.3 kg/L (10.8 lbs/gal)
• Application Temperature: 5° to 40°C (41° to 104°F)
• Skin Time: 60 Minutes at 23°C (73°F) / 50% RH
• Open Time: 45 Minutes at 23°C (73°F) / 50% RH
• Shore A Hardness: 40
• Tensile Strength: 1.8 MPa (260 psi)
• Elongation at Break: 500%
• Service Temperature Range: -50° to 90°C (-58° to 194°F)
• High-Temperature Resistance: 120°C for 24 Hours, 140°C for 1 Hour
• Shelf Life: 12 Months Below 25°C (77°F)

Compatibility:

• Wood and various metal surfaces
• Metal primers and two-component paint coatings
• Ceramic and plastic materials

Product Data Sheet

Safety Data Sheet