Description Sika 221 Adhesive & Sealant – 300ml Multi-Purpose Polyurethane Sika Sikaflex®-221 is a high-quality, one-component polyurethane adhesive and sealant designed for reliable sealing and bonding across a wide range of construction and fabrication applications. This non-sag formulation cures on exposure to atmospheric humidity to form a durable, elastic bond, making it ideal for permanent sealing where flexibility and adhesion are essential. Sikaflex-221 delivers strong adhesive performance on multiple substrates and is widely used in general construction, vehicle assembly, and industrial maintenance. Tested to ASTM C920 and Federal Specification TT-S-00230C, and classified to ANSI/UL 723 for surface burning characteristics, Sikaflex-221 offers dependable performance in demanding environments. Key Benefits One-component polyurethane sealant and adhesive Non-sag consistency for vertical and overhead applications Cures to a tough, elastic finish High adhesive strength for permanent sealing Bonds to a wide variety of substrates Ideal for general construction, fabrication, and repair work Suitable Substrates Sikaflex-221 bonds well to: Wood Metals Primed and painted metal surfaces (2-component systems) Ceramic materials Many plastics Available Colours Grey White Black
