Sikaflex®-1a is a premium-grade, high performance, moisture-cured, one-component, polyurethane-based, non-sag elastomeric sealant.

• Capable of ± 35 % joint movement.
• Eliminates time, effort, and equipment for mixing, filling cartridges and cleaning of equipment.
• High elasticity - Cures to a tough, durable, flexible consistency with exceptional cut and tear resistance.
• Capable of ± 35 % joint movement.
• Eliminates time, effort, and equipment for mixing, filling cartridges and cleaning of equipment.
• High elasticity - Cures to a tough, durable, flexible consistency with exceptional cut and tear resistance.
• Excellent adhesion - Bonds to most construction materials without primer in most cases.
• Excellent resistance to aging, weathering.
• Readily placeable at 4 °C (39 °F)
• Resists to fuel, mineral oils, and dilute minerals, plant and animal fats.
• Odorless, non-staining, can be painted over with water, oil, and rubber-based paints. Since some paints dry slowly and the surface may remain slightly tacky, a preliminary test is essential.
• Meets CAN/CGSB 19.13-M87, Classification MCG-2-25-B-N.
• Meets Federal Specification TT-S-00230C, Type II, Class A.
• Meets Federal Specification Spec TT-S-00227E
• Meets ASTM C920 Type S, Grade NS, Class 35. Use T, NT, O, M, G, I.
• Jet fuel resistant.
• ANSI/NSF Standard 61 approved for contact with potable water (Black, White, Colonial White, Aluminum Grey, Capital Tan, Limestone, Dark Bronze colours only).
• Urethane-based, suggested by EPA for radon reduction.
• USDA approved (chemically acceptable for use in meat and poultry processing areas under federal inspection).
• Meets the requirements of CFIA for use in food plants
• Ministère des Transports du Québec acceptance.
• Product qualified by The Road Authority (TRA).
• SWRI validated.
• Product recognized by the British Columbia Ministry of Transportation(BC MoT).