Sikaflex®-221 is a high-quality, versatile one-component polyurethane adhesive/sealant that cures on exposure to atmospheric moisture. It is suitable for internal sealing and simple bonding applications. It adheres well to a wide range of substrates and is suitable for making permanent elastic seals with high adhesive strength. Suitable substrates include metals, metal primers and paint coatings (2-c systems), ceramic materials and plastics. Seek manufacturer's advice and perform tests on original substrates before using Sikaflex®-221 on materials prone to stress cracking. This product is suitable for experienced professional users only. Tests with actual substrates under actual conditions must be performed to ensure adhesion and material compatibility.
