PROFESSIONAL USE PRODUCT – This is product is suitable for experienced professional users only. LONG-OPEN TIME – Sikaflex 221 remains workable for up to 45 minutes once open and will develop a skin in 60 minutes, providing temperatures are between 5˚C and 40˚C. VERSATILE – A multi-purpose sealant and adhesive with high adhesive strength. Bonds well to a wide variety of substrates, including metals, ceramics, plastics and painted materials. PERMANENTLY ELASTIC – Cures using ambient moisture into an elastic but permanent seal that does not sag and can be sanded and painted as needed. FOOD SAFE – NSF-Approved for incidental food contact. AVAILABLE IN MULTIPLE COLOURS: Available in Black, White and Light Grey.