Title: Sika 221 White 300ml Cartridge The Sika 221 White 300ml Cartridge offers a high-quality solution for various sealing and bonding applications, with its white colour, it seamlessly blends with surrounding surfaces, providing a clean and professional finish. This product demonstrates Sika’s commitment to delivering reliable and durable solutions for your sealing needs. Sikaflex 221 is a high-quality multi purpose non-sag 1-c polyurethane sealant that cures on exposure to atmospheric humidity to form a durable elastomer