It is a single-component product, elastic and resistant to aging, as well as being non-corrosive. Furthermore, it can be sanded and overpainted, as well as being odourless. Technical characteristics of the Sikaflex 221 Black Adhesive Sealant Sikaflex®-221 black is a single-component filling sealant based on polyurethane, ideal for bonding tenacious and filling spaces.
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