Sikaflex – 291 – Marine Sealant

Sikaflex 291 is a professional marine adhesive and sealant used by boat builders around the world. It can be used above and below the waterline, bonds well to metals, woods, and other marine products, and it forms an elastic / vibration resistant bond between components. This grey sealant is also a close color match with surrounding aluminum panels, and it can be sanded and painted to match surrounding areas if required.

We recommend Sikaflex 291 for sealing cable pass throughs, pump adapter plates, and joints between your intake base plate, intake housing, and transom.

Sikaflex 291 is not recommended for use with plastics that are prone to stress cracking (e.g. plexiglass, polycarbonate, etc.)

This product is sold as a 300ml (10.1 fl.oz) tube that is compatible with common caulking guns.