Sikaflex 221 Black Adhesive Sealant – Strong Multipurpose Sealant. Sikaflex 221 is a high-quality, strong, and versatile adhesive sealant designed for a wide range of industrial and DIY applications. This single-component polyurethane-based sealant is black in colour and cures on exposure to atmospheric moisture, forming a durable and flexible bond. Ideal for sealing joints, bonding materials, and ensuring long-lasting performance, it is suitable for use on various surfaces, including metals, plastics, wood, and ceramics. Perfect for automotive, construction, and industrial projects, Sikaflex 221 offers excellent resistance to weathering and ageing. With its high elasticity and superior adhesion properties, this sealant ensures a strong, reliable hold, even under dynamic stress. Whether you’re sealing seams in vehicles or carrying out repairs at home, Sikaflex 221 delivers outstanding results. Features: High-strength polyurethane-based adhesive sealant, Cures on exposure to atmospheric moisture, Durable, flexible, and resistant to ageing and weathering, Suitable for a variety of surfaces: metal, plastic, wood, and ceramics, Perfect for automotive, industrial, and DIY projects. Specifications: Colour: Black, Volume: 300ml, Application: Sealing and bonding, Material Type: Polyurethane, Weathering Resistance: High, SKU: G441.