- One component formulation
- Low odour
- Resistant to ageing and weathering exposure
- Paintable and sandable
Sikaflex-221 is a high-quality multi-purpose non-sag 1-C poly-urethane sealant that cures on exposure to atmospheric humidity to form a durable elastomer. It bonds well to a wide variety of substrates and is suitable for making permanent elastic seals of high adhesive strength. Suitable substrate materials are metals, metal primers and paint coatings (2-C systems), ceramic materials and plastics.