Sika

Sika's Sikaflex 221i sealant is a 1-component polyurethane sealant that hardens to atmospheric pressure with air moisture. It is suitable for use on metal, primers and coatings (2-component systems), ceramic materials and plastics and can be painted over and sanded. The sealing compound Sikaflex 221i has a very wide range of adhesive properties and is suitable for durable, elastic and adhesive bonds.