Sika Sikaflex® 221 Multi-Purpose Polyurethane Sealant/Adhesive - 10.3oz (300ml) Cartridge - White

Introducing Sikaflex®-221 Multi-Purpose Polyurethane Sealant/Adhesive — a high-quality, non-sag 1-C polyurethane sealant/adhesive that cures on exposure to atmospheric humidity to form a durable elastomer. This white 10.3 oz (300 ml) cartridge is your go-to solution for permanent elastic seals with high adhesive strength.

Key Benefits

• Versatile bonding and sealing — bonds to a wide variety of substrates including wood, metals (and metal primers/paint coatings), ceramics, and plastics.
• Non-sag, highly elastic — ideal for vertical surfaces and movement-prone joints, while maintaining elasticity over time.
• Weather- and age-resistant — formulated to resist aging and weathering, ensuring long-lasting performance indoors or outdoors.
• Paintable and sanding-ready — can be sanded and overpainted to blend with surrounding surfaces.
• Non-corrosive and NSF-registered — safe for many environments; NSF-registered and Nonfood substances, available in black, grey, and white; UL listed for potable water (black/grey/white).
• Quality certifications — Meets ASTM C920; ANSI/UL 723 surface burning characteristics; UL listed for potable water; widely used in construction and manufacturing.

Specifications

• Material: One-component polyurethane
• Color: White
• Size: 10.3 oz (300 ml) cartridge
• Manufacturer: Sika
• Manufacturer Part No: 90891
• UPC: 338860050980

Application and Safety

Sikaflex®-221 is designed to bond well to a wide variety of substrates, creating permanent elastic seals with high adhesive strength. It is suitable for wood, metals, ceramic materials, and plastics, and supports paints and coatings on two-component systems. It cures upon exposure to atmospheric humidity to form a durable elastomer that remains flexible over time.

Safety notice: This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov.

Elevate your sealing and bonding tasks with Sikaflex®-221 — the trusted choice for professional and DIY projects alike.