A one-component black polyurethane adhesive/sealant that bonds well to a range of substrates and is suitable for making permanent elastic seals of high adhesive strength.

The multi-purpose Sikaflex®-221 cures on exposure to atmospheric humidity. Suitable substrates are metals, metal primers and paint coatings (2-C systems), ceramic materials and plastics.

NOTE: The user should seek manufacturer’s advice and perform tests on original substrates before using this product on materials prone to stress cracking. Sikaflex®-221 is suitable for experienced professional users only. Test with actual substrates and conditions must be performed to ensure adhesion and material compatibility.

Key Features

Bonds well to a wide variety of substrates

Resistant to ageing

Can be painted

Can be sanded

Non-corrosive

Low odour

NSF-approved for incidental food contact