Sikaflex 221 Multi-Purpose Polyurethane Sealant/Adhesive – 10.3oz(300ml) Cartridge – BlackSikaflex-221 is a high-quality multi-purpose non-sag 1-c polyurethane sealant/adhesive that cures on exposure to atmospheric humidity to form a durable elastomer. Meets approvals ASTM C920 types Sikaflex-221…








